{"id":"49d29aec-1634-4466-a7fe-84a2d020ed66","shortId":"CTUMsV","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. All endpoints are pay-per-request using the x402 protocol, settling payments in USDC on the Base network. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/transactions/32` is listed as \"Premium API Access\" and requires a maximum payment of 20,000 base units of USDC (0.02 USD) per call. The platform advertises a uniform $0.02 per request price across all its endpoints. Categories of available APIs include: metrics and reports (Data & Analytics), sentiment analysis, text summarization, classification, and embeddings (AI & ML), price feeds, exchange rates, token quotes, and gas estimates (Finance & Web3), and geocoding, validation, conversion, and generation utilities (Infrastructure).\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any individual endpoint. The x402 challenge was successfully captured (HTTP 402 with valid accepts block), confirming the endpoint is live.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-data","geocoding","utility-services"],"categories":["data","llm","finance","utility"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","no-auth api","crypto payment api"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or JSON schema describing request/response formats for any endpoint","The specific endpoint /api/v1/transactions/32 is labeled 'Premium API Access' but its actual function is undocumented","No request or response examples are available anywhere in the crawled material","The broad range of claimed capabilities (AI, finance, data, utilities) cannot be verified from available material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/32","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet connect prompt. The purpose of the specific /api/v1/transactions/32 endpoint is unclear, and no input/output schemas are available for any endpoint.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T13:15:27.950Z","embedding":[-0.028411865,-0.023330688,0.035186768,0.010513306,0.018249512,-0.025024414,-0.029922485,0.023864746,0.073913574,-0.058776855,0.027694702,-0.053100586,-0.034973145,-0.04171753,-0.01864624,0.0112838745,-0.004714966,0.00995636,-0.035461426,0.0362854,0.018844604,-0.01876831,-0.029449463,0.015853882,-0.007003784,-0.011924744,0.0000911355,-0.00063991547,-0.029708862,-0.0473938,0.0546875,-0.022262573,0.005859375,0.009712219,-0.00018274784,-0.008659363,0.0021038055,0.028930664,0.037353516,-0.010314941,0.0030136108,-0.05581665,0.0033283234,-0.013832092,-0.053527832,0.00020289421,0.017532349,-0.027420044,0.011245728,0.0041923523,-0.050201416,-0.011878967,-0.01309967,0.00831604,0.0024528503,0.007865906,-0.0076522827,-0.006881714,0.008880615,0.0021781921,-0.011680603,-0.05215454,-0.017532349,-0.0058288574,-0.012039185,0.053741455,-0.008605957,0.04269409,-0.0032215118,0.05770874,0.036621094,0.05001831,0.03262329,0.012336731,0.0035076141,-0.00028657913,-0.019439697,0.06829834,-0.016357422,-0.030960083,-0.004688263,-0.010055542,-0.0597229,-0.008979797,-0.009140015,-0.05596924,-0.017120361,0.022827148,-0.034454346,0.039154053,-0.06768799,-0.013900757,-0.010513306,-0.0015392303,0.0026683807,-0.006160736,-0.003627777,0.01727295,-0.011924744,0.016479492,-0.0040664673,-0.046905518,0.017547607,0.011436462,0.043792725,0.036468506,0.023391724,0.02168274,0.0050735474,-0.0064468384,-0.048095703,0.01134491,-0.012718201,-0.014259338,0.009925842,0.008506775,-0.010818481,0.014984131,-0.029891968,0.014465332,-0.045166016,0.054473877,0.006881714,0.0058631897,-0.003604889,-0.053100586,-0.027389526,0.0115737915,-0.041778564,-0.009361267,0.010437012,0.018234253,0.028305054,-0.016021729,-0.028839111,0.011940002,-0.012031555,-0.0015211105,-0.047027588,-0.030853271,0.04208374,-0.03314209,0.015342712,0.034362793,-0.1060791,-0.016403198,-0.048217773,0.015930176,-0.034576416,-0.008148193,0.010383606,0.024353027,-0.031829834,-0.025909424,-0.025054932,-0.031036377,-0.006511688,0.038635254,-0.008766174,0.03125,-0.029067993,0.029846191,0.0209198,0.0071029663,0.015037537,0.017929077,-0.0070152283,-0.08959961,-0.08538818,-0.02809143,0.008018494,-0.03479004,-0.035491943,0.0023097992,-0.011833191,-0.07366943,-0.019607544,-0.004310608,0.0016355515,-0.03704834,-0.012229919,-0.024154663,0.018753052,-0.0040397644,-0.04711914,-0.022109985,-0.029388428,0.06573486,0.022476196,0.028640747,0.018478394,0.007724762,0.060699463,0.0385437,-0.0013179779,-0.019454956,0.011116028,-0.020431519,0.019546509,-0.0025939941,0.013305664,-0.033233643,0.03466797,0.0670166,-0.004432678,-0.024215698,-0.0061531067,-0.049835205,-0.04321289,-0.044921875,0.023956299,0.010856628,-0.011077881,0.043762207,-0.03173828,-0.03543091,-0.011306763,0.018554688,0.018753052,0.065979004,0.008430481,-0.0035705566,0.033325195,0.010414124,-0.053955078,0.0440979,0.030395508,0.012176514,-0.019943237,-0.041290283,0.040863037,0.04534912,-0.028625488,0.018463135,-0.01852417,0.02482605,-0.004196167,-0.00018274784,0.01763916,-0.013282776,-0.024307251,-0.018051147,-0.016815186,0.02368164,0.0079956055,-0.025985718,-0.031341553,-0.08758545,0.052124023,0.031982422,0.03479004,-0.011955261,0.002281189,-0.020645142,-0.00039076805,-0.08325195,0.05078125,0.07092285,0.007232666,-0.014137268,0.021728516,0.00623703,-0.03137207,0.0021915436,-0.014175415,-0.03237915,-0.011695862,0.017562866,-0.047821045,-0.017440796,0.023513794,0.020996094,0.05935669,-0.010948181,-0.042388916,-0.016693115,-0.0054130554,-0.003326416,-0.035247803,0.0068359375,-0.00041627884,0.012123108,0.032958984,0.005367279,0.013023376,0.0004887581,0.0012149811,-0.01309967,0.0061531067,-0.017044067,-0.022781372,0.012260437,-0.002313614,-0.04776001,0.0076141357,-0.0029678345,0.076416016,-0.03970337,0.037628174,-0.022155762,0.022247314,0.048431396,0.0016050339,-0.03881836,0.00932312,0.039215088,0.018035889,0.041107178,0.014709473,-0.028411865,-0.019378662,0.07336426,0.0021133423,0.007446289,-0.00020229816,0.008110046,0.03866577,-0.014671326,-0.058685303,-0.039367676,-0.0024318695,-0.03881836,0.029708862,-0.016067505,0.026290894,-0.0101623535,0.006752014,-0.023651123,-0.0018882751,-0.033935547,0.018478394,-0.020584106,0.008560181,-0.01486969,-0.03125,0.014907837,0.01210022,-0.012214661,-0.0019931793,0.046081543,0.022094727,-0.01499939,-0.03253174,-0.027526855,-0.0023727417,-0.0152282715,0.016464233,0.027801514,0.021560669,0.04168701,-0.034240723,-0.007911682,0.015960693,0.014030457,0.035705566,-0.005420685,-0.008506775,-0.06781006,-0.043029785,-0.025878906,-0.037902832,0.026382446,0.029129028,-0.0018815994,0.054595947,0.0036010742,-0.034118652,-0.0362854,0.013427734,-0.05065918,0.0029582977,0.039886475,-0.004142761,-0.030792236,-0.0006842613,0.0011405945,0.010391235,0.036346436,0.010803223,0.027374268,0.06695557,0.0340271,0.012504578,0.01550293,-0.008224487,0.036621094,0.01826477,-0.020507812,-0.030578613,-0.00881958,0.035949707,-0.0287323,-0.023895264,-0.06311035,0.06512451,0.03793335,0.07897949,0.017822266,0.008598328,0.029174805,-0.015609741,0.007980347,-0.017868042,-0.021560669,-0.026672363,-0.030639648,0.03363037,-0.008087158,-0.0040626526,-0.01927185,0.038085938,-0.009216309,0.018661499,-0.022918701,0.046966553,-0.020492554,-0.006160736,0.0104599,0.011024475,0.04748535,0.05847168,-0.045898438,0.020126343,0.015853882,-0.049468994,0.005744934,0.04397583,-0.01802063,-0.010887146,-0.050323486,-0.027557373,-0.018188477,-0.008384705,-0.044311523,-0.00762558,0.009712219,0.022369385,0.04071045,-0.018005371,-0.013198853,-0.006679535,-0.018035889,-0.04989624,-0.002325058,-0.048217773,-0.007972717,0.033172607,-0.024002075,-0.010269165,-0.0030059814,-0.00017309189,-0.0012168884,0.008361816,0.031585693,-0.014282227,-0.052520752,0.045715332,-0.00025129318,0.013214111,0.023544312,0.029067993,0.032806396,0.015625,0.052612305,0.010139465,-0.018966675,-0.061340332,0.018661499,-0.046783447,-0.00085020065,0.016601562,-0.019332886,-0.004333496,-0.009605408,-0.03488159,-0.03366089,0.018234253,-0.018661499,0.000518322,0.0151901245,-0.02960205,-0.035583496,-0.068481445,-0.011444092,0.00022935867,0.07055664,0.016708374,-0.006778717,-0.06121826,0.004688263,0.030212402,0.0016641617,0.04888916,-0.015159607,-0.00756073,-0.020095825,-0.036712646,-0.004180908,-0.027374268,0.029342651,-0.0061454773,-0.0039367676,0.011077881,0.0071487427,0.014060974,0.004512787,0.005962372,0.013542175,-0.02923584,-0.010719299,-0.005393982,0.027801514,0.022766113,-0.006980896,-0.031433105,0.042022705,0.014122009,0.03793335,-0.036987305,-0.008560181,-0.006954193,0.0045433044,0.023773193,-0.023330688,-0.016784668,-0.010253906,-0.046539307,-0.061767578,0.037902832,-0.019348145,0.028121948,0.025543213,0.0033302307,0.022567749,-0.017303467,0.017623901,0.009941101,-0.034118652,-0.0055732727,-0.027069092,-0.035980225,-0.020462036,-0.0042533875,-0.027877808,0.02218628,-0.020584106,0.008560181,0.0019350052,-0.028060913,0.03353882,0.009429932,-0.010871887,0.022613525,0.0074653625,0.025131226,0.04244995,0.011909485,-0.04876709,0.019851685,-0.0007224083,0.014923096,-0.0072135925,0.042419434,0.03387451,-0.0101623535,-0.016555786,-0.0060691833,-0.023757935,-0.0209198,0.0012140274,-0.0027923584,0.003610611,-0.0033435822,-0.0395813,0.014465332,0.0050315857,-0.024246216,-0.03237915,0.019729614,0.008178711,-0.037384033,0.02470398,0.023773193,0.051086426,-0.017990112,0.018630981,0.0025119781,0.047851562,0.04248047,0.007160187,-0.01071167,0.013130188,-0.014587402,0.0054779053,-0.0040397644,-0.010826111,0.019332886,0.001950264,0.018661499,0.022766113,0.014564514,-0.028808594,-0.03265381,-0.00044560432,-0.019577026,-0.029067993,0.023544312,0.01121521,0.022399902,-0.028961182,0.022003174,0.006084442,-0.011459351,-0.008468628,-0.011329651,0.030349731,-0.0126571655,-0.013305664,0.023422241,0.0051727295,0.020553589,-0.053466797,-0.011039734,0.009666443,0.0107040405,-0.025527954,-0.048309326,-0.046539307,-0.0017471313,0.03540039,0.013282776,0.026885986,0.03793335,-0.0038471222,0.007194519,0.02960205,-0.0070533752,-0.013793945,-0.005744934,-0.05706787,-0.031433105,-0.00028419495,0.008552551,-0.03366089,0.017852783,-0.0024299622,-0.027740479,-0.00042796135,-0.009529114,-0.006916046,-0.020935059,0.01637268,0.045318604,0.0141067505,0.021896362,-0.0178833,-0.024932861,-0.005050659,0.009529114,0.025848389,-0.049072266,0.029968262,-0.0035877228,-0.01020813,-0.0047683716,0.017074585,0.023162842,0.02381897,0.014640808,0.032165527,-0.041900635,0.04849243,-0.026931763,0.025024414,0.006210327,-0.040618896,-0.017562866,-0.034240723,-0.012191772,0.038604736,-0.030319214,-0.014015198,-0.039245605,-0.030532837,-0.011528015,-0.05569458,0.011131287,0.041137695,0.041015625,-0.024154663,0.008361816,0.00031733513,0.012794495,-0.014137268,0.0016803741,-0.0095825195,0.018295288,0.02859497,-0.0026798248,-0.011146545,-0.022598267,-0.015670776,-0.006668091,-0.05999756,-0.060272217,-0.009353638,0.004673004,-0.015106201,-0.013618469,-0.024002075,-0.04196167,0.002319336,-0.040618896,0.009750366,-0.0039100647,0.018966675,0.012718201,-0.020523071,-0.0016927719,0.013160706,-0.013938904,0.026885986,-0.0031433105,0.00066137314,-0.045715332,0.018218994,0.014312744,0.018081665,-0.007255554,-0.023208618,-0.004547119,-0.022827148,-0.05343628,-0.006755829,-0.0050086975,-0.017623901,-0.016540527,0.00258255,-0.060150146,-0.004558563,-0.02607727,-0.0068893433,0.026489258,0.016494751,0.0068092346,-0.014213562,0.019226074,-0.004337311,-0.013648987,-0.027267456,0.0064201355,0.011146545,0.01033783,0.025238037,0.05126953,0.004497528,-0.026168823,0.007949829,0.008453369,0.017532349,-0.0154953,0.011558533,-0.019958496,0.017807007,-0.014389038,-0.0071144104,-0.03643799,-0.0016174316,0.07946777,0.0039634705,-0.009269714,-0.010902405,-0.012123108,0.010154724,0.032196045,-0.03555298,0.002998352,-0.02885437,0.01977539,-0.023284912,0.009712219,-0.00011104345,0.02456665,-0.013442993,-0.051330566,-0.012496948,-0.0056152344,-0.0034370422,-0.068481445,-0.025878906,-0.07080078,0.0041542053,-0.0063705444,-0.031097412,0.0032634735,0.011489868,-0.0088272095,-0.077941895,-0.0016908646,0.04711914,-0.0003862381,0.029556274,-0.0034713745,0.023788452,0.037628174,-0.013366699,0.0032863617,0.026382446,-0.03378296,-0.019424438,-0.023666382,0.019104004,-0.002319336,-0.0079422,0.0026416779,0.0064697266,0.013153076,-0.00013113022,0.014785767,-0.0115356445,0.028747559,-0.018753052,0.015159607,-0.009475708,-0.011795044,0.038391113,-0.049682617,0.02508545,0.00995636,-0.007572174,0.0074920654,0.036071777,0.041168213,-0.035705566,-0.01737976,0.025238037,0.013572693,0.03173828,-0.019454956,0.05517578,0.008338928,-0.013793945,0.007030487,-0.007724762,-0.010215759,-0.024963379,-0.03213501,0.019638062,0.001329422,0.009468079,-0.01197052,-0.009468079,0.021774292,0.0022029877,0.009788513,-0.009124756,-0.021072388,-0.031921387,0.008399963,-0.0015859604,0.0040016174,0.0047683716,0.029205322,0.022155762,0.033996582,0.006072998,-0.021850586,0.0045700073,0.03475952,-0.011383057,0.0027103424,0.029571533,0.0072135925,0.013923645,0.020202637,0.010360718,-0.058624268,-0.00730896,-0.01889038,-0.016616821,-0.0007662773,-0.011192322,-0.012710571,-0.0041999817,0.002691269,-0.014015198,-0.031951904,0.0016613007,-0.026107788,-0.024932861,-0.004421234,-0.008010864,0.023910522,0.01184082,0.00014448166,0.007820129,-0.01134491,0.04837036,-0.0043945312,-0.024353027,0.024642944,0.02909851,0.015586853,-0.03881836,-0.009613037,-0.0178833,-0.008544922,0.0055389404,-0.04107666,0.017929077,0.03918457,-0.013404846,-0.0011520386,0.0049362183,0.028564453,-0.00712204,-0.00031113625,-0.010787964,0.0211792,-0.014724731,0.034332275,-0.056854248,0.02734375,0.014816284,0.0063095093,-0.013137817,-0.021331787,-0.026062012,0.022262573,-0.0043296814,-0.011520386,0.05596924,0.0027217865,0.026779175,-0.0154418945,-0.018692017,0.0014629364,-0.02671814,-0.02671814,0.010215759,-0.017745972,0.008110046,0.010108948,-0.027908325,0.031204224,-0.032165527,0.008361816,0.0039253235,0.0077400208,-0.0067367554,-0.0154800415,-0.00054216385,-0.001791954,-0.015991211,-0.00944519,-0.008995056,0.05255127,0.019927979,0.031204224,0.041870117,0.0118255615,0.0024642944,-0.041809082,-0.025756836,0.006515503,-0.0107421875,0.02331543,-0.019439697,0.036865234,0.048309326,-0.004627228,0.0385437,0.038330078,0.04257202,-0.0008430481,0.0155181885,-0.019378662,0.024490356,-0.016281128,0.01285553,0.00011098385,0.04119873,-0.02708435,0.020706177,0.020401001,0.01802063,-0.009841919,0.038513184,0.0670166,0.020309448,0.00035214424,0.02986145,-0.004337311,0.0010004044,-0.00048041344,-0.02798462,0.055847168,0.015823364,0.050689697,0.037902832,0.004322052,0.007785797,0.023330688,-0.03253174,-0.025421143,0.05734253,0.021820068,-0.01864624,-0.010009766,-0.0102005005,0.01134491,-0.043945312,-0.023376465,0.014831543,-0.005558014,0.006038666,-0.012199402,-0.004283905,-0.0061454773,0.0050582886,0.0140686035,0.008506775,-0.009178162,0.024520874,0.025787354,0.009033203,0.029174805,-0.004688263,0.02885437,-0.023483276,-0.0178833,0.02017212,0.016799927,-0.009223938,0.00390625,0.03338623,-0.0003361702,0.037750244,0.038208008,-0.024429321,0.00016736984,0.028121948,0.017807007,0.00957489,0.055847168,0.038604736,0.012168884,0.04449463,0.036376953,0.04055786,-0.029525757,0.019348145,-0.0012540817,0.0010824203,-0.015144348,-0.00869751,0.0067481995,-0.011833191,0.023910522,-0.007865906,-0.015144348,0.02029419,0.022735596,-0.011276245,-0.008811951,-0.006679535,0.016464233,-0.020858765,-0.003364563,0.02003479,-0.016296387,0.027496338,0.012863159,0.023406982,-0.017730713,0.028060913,-0.0016860962,-0.020065308,0.0016593933,0.029663086,-0.035095215,0.0067634583,-0.0073013306,-0.0032577515,-0.05355835,0.0051193237,0.019973755,-0.011459351,0.021820068,0.010246277,-0.010353088,-0.0027236938,0.024383545,0.012573242,-0.009544373,-0.008895874,-0.02204895,0.03677368,0.036193848,0.0019311905,0.006801605,-0.014732361,-0.011436462,0.0053901672,-0.003320694,-0.0018663406,-0.010353088,-0.015144348,-0.018081665,0.014015198,0.025543213,0.020812988,0.0463562,-0.02015686,-0.012466431,0.013465881,0.039794922,0.0018081665,0.0001989603,-0.00058317184,0.027236938,-0.027496338,0.041534424,0.046142578,0.011100769,0.034179688,-0.0020198822,-0.007850647,0.010398865,-0.010864258,0.026367188,-0.016418457,0.004852295,-0.000957489,0.036468506,-0.015670776,-0.043029785,0.009025574,-0.017608643,-0.025177002,-0.01701355,0.009414673,-0.0038795471,0.032714844,0.0435791,0.017578125,-0.028930664,0.058776855,-0.016235352,0.03604126,0.0046806335,-0.018814087,0.054992676,0.02003479,0.03729248,0.016296387,0.013847351,-0.038879395,0.014389038,0.03378296,0.023773193,0.007030487,-0.0053901672,-0.015556335,0.032928467,-0.0066719055,0.03463745,-0.004306793,0.013900757,0.014320374,-0.0076065063,-0.011077881,-0.009460449,-0.004219055,0.0028533936,0.055480957,-0.018585205,-0.0069618225,-0.030639648,-0.01008606,0.022109985,-0.0032024384,-0.0018005371,-0.011352539,-0.01977539,0.013656616,-0.031555176,-0.020812988,0.018554688,0.024307251,-0.04611206,-0.014190674,0.011558533,0.02053833,-0.02104187,0.025146484,0.015197754,0.000039041042,0.008651733,0.042144775,-0.010429382,0.029571533,-0.0074653625,0.030853271,0.02229309,0.00995636,-0.026412964,-0.0054092407,0.012863159,-0.012519836,0.017089844,0.034606934,-0.018356323,-0.00038313866,-0.0053520203,0.0016860962,-0.008049011,0.0028648376,-0.012329102,0.012229919,-0.00484848,-0.012840271,0.016937256,0.007095337,0.0030002594,0.013412476,-0.0005288124,-0.016281128,0.014518738,0.03869629,0.01927185,-0.03277588,0.000084757805,0.008743286,-0.003068924,-0.018447876,-0.0104599,-0.011817932,-0.032409668,0.009361267,0.017532349,0.010406494,0.019470215,-0.030639648,-0.0016832352,0.018676758,0.004962921,0.011131287,0.0046920776,-0.017807007,0.012565613,-0.016342163,-0.0072402954,-0.020187378,-0.011489868,0.013870239,0.025497437,-0.00033283234,-0.028121948,0.019424438,-0.007843018,0.023452759,0.0039100647,-0.003238678,0.019424438,-0.011039734,-0.0018119812,0.002954483,0.023620605,-0.0014810562,-0.0107803345,-0.012184143,0.030578613,0.050994873,-0.013748169,-0.008361816,0.015731812,0.015548706,0.025146484,0.041900635,0.01374054,0.03564453,0.032958984,-0.01966858,-0.026397705,0.018096924,-0.009246826,-0.03250122,0.012779236,-0.0009994507,-0.014549255,0.021850586,0.0046691895,-0.00033450127,-0.033569336,-0.011528015,-0.0053596497,-0.020065308,0.016647339,-0.0039863586,0.018356323,-0.016906738,-0.016082764,0.01184845,-0.024169922,-0.05105591,-0.010314941,-0.0074806213,-0.005607605,-0.05215454,0.006160736,-0.021820068,0.008094788,-0.019943237,0.007472992,-0.0066184998,0.017791748,-0.009536743,-0.017425537,-0.0038661957,0.025558472,0.026535034,-0.0006828308,0.01374054,-0.021636963,-0.009689331,-0.027191162,0.013450623,-0.014778137,0.02482605,-0.0012426376,0.0362854,0.019454956,-0.018997192,-0.002204895,-0.01374054,-0.0073127747,-0.019897461,-0.014320374,-0.030883789,0.023361206,0.018875122,-0.0021781921,-0.0074386597,0.031707764,-0.026321411,-0.0049591064,0.026443481,0.029525757,0.007888794,0.035583496,-0.018951416,0.0033874512,-0.015014648,-0.007507324,-0.015548706,0.0054969788,0.008956909,0.01247406,-0.0029354095,0.0053977966,0.017059326,-0.009025574,0.0048942566,0.027816772,0.0134887695,-0.0054359436,0.043426514,0.018508911,0.005947113,-0.015853882,-0.009689331,0.027130127,0.051086426,0.009475708,0.006626129,-0.010368347,0.0035305023,-0.01576233,0.007183075,0.002193451,-0.02218628,-0.050994873,-0.01826477,-0.032318115,0.02708435,-0.0058403015,0.0059661865,-0.014373779,0.017456055,-0.012931824,-0.025421143,-0.01889038,0.030059814,0.016616821,-0.020950317,-0.010879517,0.012878418,0.019866943,-0.028213501,-0.0035877228,-0.04135132,-0.03289795,-0.0105896,-0.012054443,0.020645142,0.00472641,-0.005077362,-0.001868248,-0.005744934,0.006511688,-0.005344391,0.01966858,-0.005405426,-0.000102341175,0.019882202,0.01927185,-0.019866943,0.026184082,-0.0064430237,-0.0033111572,0.0048179626,-0.010177612,0.014839172,-0.020065308,0.038116455,-0.006591797,-0.0019779205,0.033416748,0.00023329258,0.01966858,-0.03982544,-0.0010576248,-0.000010073185,-0.0071029663,0.04724121,-0.01864624,-0.013618469,0.009918213,-0.023391724,-0.02041626,0.002538681,0.012306213,0.02432251,-0.00054836273,0.05697632,-0.0048103333,-0.0062828064,0.010940552,0.016815186,-0.009315491,0.0029621124,0.02909851,0.0062065125,0.00630188,-0.005050659,-0.010444641,-0.031311035,-0.011543274,0.021865845,-0.015655518,-0.010574341,0.03201294,0.018707275,0.044067383,-0.009803772,0.026489258,0.017745972,0.00730896,0.02748108,0.002653122,0.04849243,-0.006210327,-0.028915405,0.0011081696,0.0008983612,-0.01826477,0.01436615,0.0019836426,0.004573822,-0.038330078,0.009284973,0.0018901825,0.020248413,-0.017974854,0.018981934,-0.024719238,-0.0131073,-0.039398193,-0.007785797,-0.039245605,0.0027217865,0.027236938,0.005897522,0.033813477,-0.003982544,-0.022445679,0.027389526,0.052886963,0.013885498,-0.02609253,-0.0206604,0.006591797,-0.0013074875,0.00049352646,0.011962891,-0.01737976,-0.013763428,0.00157547,-0.013015747,0.012641907,-0.014419556,0.018600464,0.0073013306,0.0071487427,-0.008453369,0.019577026,-0.00793457,-0.0056915283,0.014549255,0.00011873245,0.03314209,0.024765015,-0.015586853,0.013961792,0.01525116,-0.049743652,0.059783936,-0.0048675537,0.034851074,-0.013549805,0.013870239,-0.04260254,-0.016708374,-0.014549255,0.007774353],"createdAt":"2026-04-18T19:26:08.319Z","updatedAt":"2026-04-23T02:01:49.019Z","lastSeenAt":"2026-04-23T02:01:49.019Z","tsv":"'/api':194 '/api/v1/transactions/32':110 '/docs':193 '/pricing':195 '/readme':197 '/request':19,38 '0.02':18,37,129,138 '000':124 '20':123 '402':233 'accept':236 'access':116 'across':142 'advertis':135 'ai':12,31,163 'ai-inference' 'ai/ml':57 'analysi':157 'analyt':56,155 'api':5,24,45,87,115,149 'attach':98 'avail':148 'base':8,27,82,125 'base network api' 'beyond':185 'block':237 'broad':50 'call':4,23,132 'caller':96 'captur':231 'categori':146 'challeng':228 'classif':160 'classification' 'collect':51 'commit':95 'confirm':238 'connect':203 'content':209 'convers':179 'crypto payment api' 'crypto-data' 'data':11,30,55,60,154 'data-analytics' 'detail':220 'document':184,221 'embed':162 'embeddings' 'enabl':44 'endpoint':16,35,53,66,108,145,225,240 'estim':173 'exampl':217 'exchang':167 'extrem':190 'feed':166 'financ':13,32,174 'finance-data' 'finance/web3':59 'gas':172 'general':62 'generat':181 'geocod':177 'geocoding' 'header':102 'http':232 'includ':150 'individu':224 'infer':58 'infrastructur':183 'key':88 'land':187 'limit':91 'list':112 'live':242 'low payment fee' 'lowpaymentfee.com':39 'maximum':120 'metric':151 'micropayment api' 'ml':164 'network':83 'no-auth api' 'offer':10,29 'openapi':213 'page':188,198 'pay':2,21,69 'pay per call api' 'pay-per-cal':1,20 'pay-per-request':68 'payment':77,101,121 'per':3,22,70,131,139 'platform':6,25,46,134 'premium':114 'price':141,165 'prompt':205 'protocol':75 'provid':48 'quot':170 'rate':90,168 'render':200 'report':153 'request':71,105,140 'request/response':216 'requir':118 'schema':214 'sentiment':156 'sentiment-analysis' 'servic':64 'settl':76 'simpli':97 'span':54 'spars':191 'specif':107 'subscript':94 'substant':208 'success':230 'summar':159 'text':158 'text-summarization' 'token':169 'uniform':137 'unit':126 'usd':130 'usdc':9,28,79,128 'usdc api' 'usdc-base' 'use':72 'util':15,34,63,182 'utility-services' 'valid':178,235 'wallet':204 'web3':175 'x402':43,74,100,227 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"5315bd37-208f-418c-98e7-b344113124c6","listingId":"49d29aec-1634-4466-a7fe-84a2d020ed66","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:08.319Z"}],"sources":[{"listingId":"49d29aec-1634-4466-a7fe-84a2d020ed66","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/32","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:08.319Z","lastSeenAt":"2026-04-23T02:01:49.019Z"}],"details":{"listingId":"49d29aec-1634-4466-a7fe-84a2d020ed66","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/32 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform pricing of $0.02 per request across all endpoints","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units USDC (0.02 USD) on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/32"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/32"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying real-time financial data (prices, exchange rates, gas estimates) without API key management","Running AI inference tasks (sentiment analysis, summarization, classification, embeddings) on a per-call basis","Accessing utility services like geocoding, validation, and data conversion with micropayments","Agents autonomously purchasing API calls using x402 USDC payments on Base"],"bestFor":["AI agents that need frictionless, keyless API access via x402","Developers prototyping with pay-as-you-go endpoints at very low cost","Web3-native applications that prefer on-chain payment settlement"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads where $0.02/request adds up significantly","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.68Z"},"updatedAt":"2026-04-23T02:01:49.019Z"}}