{"id":"cd16c4e6-b823-4db1-bd6d-189ca8a63ee2","shortId":"AGwD7x","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network using the x402 payment protocol. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access any endpoint.\n\nThe specific endpoint at `/api/v1/payments/10` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a maxAmountRequired of 20000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The platform also exposes endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point.\n\nDocumentation is extremely sparse: the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled pages. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but without documentation it is unclear what request body this specific endpoint expects or what response it returns.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base-network","no-api-key","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","geocoding","utility-services"],"categories":["api-platform","llm","finance","geo"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","crypto-paid API","serverless API access"],"warnings":["Documentation pages (/docs, /pricing, /api, /README) all return only 'Connect wallet' with no usable content","No OpenAPI or schema documentation available for any endpoint","The specific purpose and expected request/response format of /api/v1/payments/10 is undocumented","No examples or sample responses are available from the provider"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/10","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/payments/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and the landing page lists available endpoints with pricing. However, documentation pages are empty (just 'Connect wallet'), there is no OpenAPI spec, no request/response schemas, and no examples. The specific purpose of /api/v1/payments/10 is unclear beyond 'Premium API Access'. This is effectively a stub listing.","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":"2026-04-19T06:32:01.854Z","embedding":[-0.022537231,-0.029205322,0.033111572,0.00818634,0.012313843,-0.029693604,-0.021987915,0.030700684,0.06744385,-0.057373047,0.03274536,-0.055603027,-0.032562256,-0.028503418,-0.019012451,0.010063171,0.0007557869,0.0022392273,-0.03414917,0.03265381,0.027542114,-0.011260986,-0.035949707,0.0284729,0.0013084412,-0.018295288,-0.0047416687,-0.0042800903,-0.022415161,-0.04458618,0.044189453,-0.032958984,-0.008956909,0.014511108,-0.012390137,-0.002855301,-0.0005578995,0.03173828,0.022766113,-0.015808105,-0.004917145,-0.07080078,0.010681152,-0.014305115,-0.06439209,-0.0040664673,0.012832642,-0.015716553,-0.00040364265,0.00047683716,-0.041931152,-0.008262634,-0.0059432983,0.007873535,0.0010700226,0.011459351,-0.010353088,-0.006565094,0.007396698,0.012298584,-0.009239197,-0.05441284,-0.018249512,-0.004623413,0.0046424866,0.045043945,-0.0061836243,0.03668213,0.0010004044,0.07019043,0.035247803,0.04916382,0.030273438,0.010467529,0.0001475811,-0.015975952,-0.002363205,0.054992676,-0.0014333725,-0.037109375,-0.016662598,-0.014862061,-0.054534912,-0.011077881,-0.02168274,-0.053894043,-0.023452759,0.024749756,-0.031921387,0.035827637,-0.067871094,-0.000027239323,-0.009628296,-0.0023536682,0.0074882507,-0.01171875,-0.01638794,0.025466919,-0.0026569366,0.013214111,-0.012786865,-0.045166016,0.009254456,0.009208679,0.038482666,0.059173584,0.02053833,0.017288208,0.008216858,-0.01210022,-0.037139893,0.012702942,-0.009017944,-0.009750366,0.011222839,0.0038280487,-0.011108398,0.011787415,-0.032470703,0.0067253113,-0.04638672,0.05722046,0.014678955,0.0029296875,0.0073928833,-0.048095703,-0.01626587,0.013824463,-0.027160645,0.00141716,0.011413574,0.013801575,0.026931763,-0.011383057,-0.04208374,0.017623901,-0.02961731,-0.0090408325,-0.046691895,-0.032196045,0.041259766,-0.029159546,0.011566162,0.038238525,-0.0927124,-0.02180481,-0.03967285,0.0024280548,-0.027526855,-0.016418457,0.009231567,0.022735596,-0.02017212,-0.010612488,-0.023971558,-0.021392822,-0.0042152405,0.037139893,-0.008232117,0.03768921,-0.013748169,0.0256958,0.011253357,0.003835678,0.016418457,0.033966064,0.007904053,-0.0803833,-0.08135986,-0.02104187,0.0018367767,-0.025848389,-0.024719238,0.00818634,-0.008605957,-0.07128906,-0.013343811,-0.013038635,-0.012107849,-0.05130005,-0.0018367767,-0.029464722,0.018859863,-0.0023422241,-0.05581665,-0.030319214,-0.025970459,0.06088257,0.035095215,0.024902344,0.0236969,-0.015403748,0.06616211,0.025848389,-0.014381409,-0.021438599,0.026977539,-0.023483276,0.027755737,-0.0077552795,0.020874023,-0.023544312,0.034973145,0.06994629,0.009231567,-0.025939941,-0.010421753,-0.058624268,-0.064331055,-0.03491211,0.023422241,0.00064992905,0.0067329407,0.028320312,-0.031341553,-0.023620605,0.009208679,0.016052246,0.01828003,0.06427002,0.007183075,-0.003019333,0.042266846,0.015007019,-0.052642822,0.048095703,0.04119873,0.023284912,-0.022857666,-0.032592773,0.032836914,0.03942871,-0.030517578,0.022384644,-0.015716553,0.020141602,-0.0069122314,0.009094238,0.009109497,-0.00894165,-0.017959595,-0.0181427,-0.019439697,0.023330688,0.009490967,-0.027420044,-0.033447266,-0.073913574,0.049560547,0.024627686,0.045288086,-0.0057144165,0.0073661804,-0.026565552,-0.016784668,-0.07922363,0.06311035,0.06951904,-0.0019607544,-0.019805908,0.026153564,-0.0069465637,-0.039916992,0.0074424744,-0.01626587,-0.024505615,-0.025039673,0.013435364,-0.036376953,-0.009681702,0.028015137,0.022827148,0.05117798,-0.011077881,-0.053344727,-0.021362305,-0.0048599243,0.0023212433,-0.034851074,-0.003698349,-0.005039215,0.027862549,0.023864746,-0.0024929047,0.015686035,-0.0062828064,0.000037014484,-0.007255554,0.0015144348,-0.0101623535,-0.021881104,0.018096924,0.007873535,-0.059509277,0.0036735535,-0.0066070557,0.06854248,-0.04800415,0.039794922,-0.012145996,0.015327454,0.052947998,0.0005021095,-0.048431396,0.002811432,0.028213501,0.015289307,0.056640625,0.014831543,-0.025131226,-0.009284973,0.07196045,-0.008712769,0.00086832047,0.018661499,0.016189575,0.038970947,-0.0039367676,-0.062683105,-0.04864502,0.0013961792,-0.017944336,0.03451538,-0.016937256,0.017440796,-0.0138549805,0.013381958,-0.02633667,0.0016994476,-0.024719238,0.0014438629,-0.01676941,0.010787964,-0.009544373,-0.026565552,0.013183594,0.013504028,-0.012962341,0.01864624,0.045166016,0.015014648,-0.0002708435,-0.025741577,-0.03729248,-0.0154953,-0.010391235,0.009742737,0.023391724,0.018508911,0.056243896,-0.03189087,0.0020313263,0.027648926,0.008575439,0.03970337,-0.001534462,-0.010139465,-0.061767578,-0.052612305,-0.027526855,-0.03543091,0.027862549,0.009757996,-0.0059661865,0.06427002,0.008811951,-0.019454956,-0.045959473,0.0143585205,-0.039001465,-0.008773804,0.041503906,-0.018600464,-0.03540039,0.012916565,-0.013221741,0.00034284592,0.03677368,0.019683838,0.017868042,0.0647583,0.0385437,0.012084961,0.023345947,-0.0015459061,0.02772522,0.0063056946,-0.02909851,-0.015899658,-0.015930176,0.036590576,-0.025268555,-0.029922485,-0.0579834,0.062347412,0.03765869,0.080078125,0.022628784,0.009880066,0.042236328,-0.015586853,0.01574707,-0.025146484,-0.016708374,-0.024368286,-0.05722046,0.03414917,-0.00945282,-0.0102005005,-0.021606445,0.04260254,0.000049352646,0.019210815,-0.030883789,0.033569336,-0.011138916,-0.008163452,0.023864746,0.010734558,0.056762695,0.06365967,-0.052978516,0.021987915,0.014961243,-0.031173706,-0.0036144257,0.03543091,-0.020935059,-0.006752014,-0.04940796,-0.030166626,-0.0055389404,-0.006690979,-0.04916382,0.0005135536,0.009986877,0.020523071,0.021575928,-0.011054993,-0.008308411,-0.0038375854,-0.019561768,-0.054901123,-0.0008792877,-0.03881836,0.0011005402,0.026824951,-0.02798462,-0.009231567,0.0032539368,-0.0067367554,-0.003955841,0.026428223,0.033843994,0.0021839142,-0.060028076,0.03781128,0.00642395,0.008369446,0.014533997,0.034240723,0.018478394,0.021636963,0.044189453,0.0070762634,-0.014976501,-0.06756592,0.019683838,-0.04232788,0.015106201,0.015602112,-0.031341553,-0.004196167,-0.01687622,-0.037322998,-0.03387451,0.007545471,-0.02104187,-0.00062417984,0.030471802,-0.021392822,-0.027542114,-0.043670654,-0.029067993,-0.0015983582,0.064331055,0.018081665,0.0007238388,-0.05609131,-0.010307312,0.014343262,0.003692627,0.024978638,-0.014198303,-0.010139465,-0.012817383,-0.030136108,-0.013969421,-0.018737793,0.024276733,-0.012016296,0.00021135807,0.02293396,0.0112838745,0.027786255,0.007873535,0.01360321,0.024795532,-0.027191162,-0.005622864,-0.013336182,0.03338623,0.017974854,-0.008178711,-0.054382324,0.042541504,0.012741089,0.03866577,-0.041229248,-0.003665924,-0.0010585785,0.013473511,0.016983032,-0.0027694702,-0.008346558,-0.0118637085,-0.048706055,-0.068115234,0.039764404,-0.019943237,0.03112793,0.029129028,0.010009766,0.020568848,-0.01586914,0.00008517504,0.012588501,-0.018692017,-0.0072669983,-0.027130127,-0.03842163,-0.018173218,-0.016494751,-0.028121948,0.02519226,-0.015533447,0.012001038,-0.0030097961,-0.024246216,0.02444458,0.0059280396,-0.011436462,0.014175415,0.005947113,0.019577026,0.041107178,0.005153656,-0.04095459,0.025146484,0.014602661,0.010482788,-0.010192871,0.044128418,0.02961731,-0.0016098022,-0.008216858,-0.014022827,-0.023101807,-0.030319214,0.008522034,0.0012817383,0.008140564,0.0022964478,-0.044677734,0.017807007,0.0023536682,-0.03414917,-0.02909851,0.0046844482,0.0158844,-0.031463623,0.016601562,0.020217896,0.051757812,-0.026382446,-0.0009498596,0.003282547,0.033721924,0.03237915,0.017807007,-0.005836487,0.016601562,-0.0073013306,0.015533447,-0.0060920715,-0.018630981,0.024368286,-0.00047779083,0.021575928,0.019424438,0.008125305,-0.025726318,-0.026184082,0.0029525757,-0.021240234,-0.02633667,0.021484375,0.018356323,0.02861023,-0.030426025,0.015327454,0.014213562,-0.017318726,-0.01852417,-0.015548706,0.04159546,-0.00907135,-0.010421753,0.019210815,0.011619568,0.031097412,-0.054107666,-0.0077934265,0.0044288635,0.007255554,-0.025665283,-0.05050659,-0.033966064,0.0030231476,0.04055786,0.01386261,0.026672363,0.03125,-0.00021195412,0.011688232,0.020324707,-0.0019607544,-0.020767212,-0.014877319,-0.05114746,-0.025863647,-0.015808105,0.0043907166,-0.033996582,0.014198303,-0.0020980835,-0.030548096,0.0064315796,-0.0065689087,-0.004463196,-0.013473511,0.014137268,0.04348755,-0.005332947,0.0140686035,-0.024658203,-0.039489746,-0.009231567,0.009002686,0.017364502,-0.048675537,0.011009216,-0.016174316,-0.011444092,-0.0011663437,0.0105896,0.023361206,0.022567749,0.01209259,0.025909424,-0.044311523,0.049682617,-0.036468506,0.013114929,0.0032253265,-0.036834717,-0.014793396,-0.023757935,-0.012145996,0.036956787,-0.034210205,-0.0013532639,-0.033111572,-0.041748047,-0.013450623,-0.05847168,0.021652222,0.03842163,0.045776367,-0.02798462,-0.0040664673,-0.003944397,0.0016403198,-0.014320374,0.006839752,-0.012817383,0.025177002,0.025650024,0.0009841919,-0.028640747,-0.03390503,-0.019439697,0.002374649,-0.042297363,-0.053741455,-0.00881958,0.00579834,-0.010887146,-0.004634857,-0.023895264,-0.04031372,-0.0017738342,-0.03967285,0.004463196,0.0041160583,0.017654419,0.008255005,-0.020736694,-0.004550934,0.01448822,-0.014160156,0.03253174,0.004573822,-0.0124053955,-0.04296875,0.0027446747,0.025314331,0.021209717,-0.009231567,-0.012901306,-0.0066223145,-0.019943237,-0.051818848,0.0026168823,-0.003873825,-0.007835388,-0.010986328,0.011932373,-0.048095703,-0.005962372,-0.025512695,-0.0031318665,0.024810791,0.008773804,0.008216858,0.0020618439,0.016113281,-0.0046844482,-0.010864258,-0.030960083,0.014160156,0.010398865,0.006401062,0.029647827,0.04537964,0.0004131794,-0.035186768,0.016723633,0.002128601,0.017532349,-0.022018433,0.00071907043,-0.017425537,0.010528564,-0.01235199,-0.012748718,-0.030838013,-0.00091171265,0.084228516,0.0023097992,-0.0047035217,-0.007736206,-0.017211914,0.019760132,0.031982422,-0.03933716,-0.00617218,-0.02835083,0.018554688,-0.03253174,0.0036334991,0.005142212,0.017242432,-0.013839722,-0.05380249,-0.016311646,-0.011016846,-0.0026340485,-0.06542969,-0.027801514,-0.08001709,0.005104065,-0.017974854,-0.02255249,0.00289917,0.008476257,-0.026245117,-0.08343506,-0.0011587143,0.05114746,0.0027694702,0.019897461,-0.008560181,0.016967773,0.027130127,-0.03652954,0.004043579,0.02923584,-0.024093628,-0.021133423,-0.023376465,0.020507812,-0.019165039,-0.0020866394,0.0026378632,0.007827759,0.008056641,-0.0070762634,0.007118225,-0.0061531067,0.036071777,-0.020614624,0.01512146,-0.008796692,-0.015419006,0.034484863,-0.04727173,0.030273438,0.004425049,-0.007965088,0.014953613,0.03378296,0.044647217,-0.032836914,-0.02267456,0.016860962,0.020828247,0.034729004,-0.019226074,0.05053711,0.0072746277,-0.015899658,0.012809753,-0.014305115,-0.015602112,-0.026107788,-0.035491943,0.022735596,0.0034732819,0.012619019,-0.012954712,0.002752304,0.022094727,0.011329651,0.015701294,-0.0035171509,-0.021575928,-0.02027893,0.00070762634,0.0011310577,0.008773804,-0.009719849,0.032684326,0.030273438,0.027267456,0.0046539307,-0.016845703,-0.0014028549,0.029800415,-0.009971619,0.0002541542,0.026275635,0.000831604,0.013504028,0.023269653,0.009757996,-0.05014038,-0.0178833,-0.033599854,-0.017196655,0.0020656586,-0.010215759,-0.011077881,-0.00283432,0.004600525,-0.014785767,-0.034332275,0.0009822845,-0.03314209,-0.023117065,-0.0052337646,-0.0141067505,0.0236969,0.013214111,0.006160736,0.0019626617,-0.009864807,0.04071045,-0.0020179749,-0.008834839,0.03555298,0.033935547,0.00920105,-0.029434204,0.0021972656,-0.011444092,-0.012420654,0.008666992,-0.037017822,0.013954163,0.049194336,-0.019561768,-0.00066423416,-0.0007033348,0.023071289,-0.0076446533,0.0030517578,-0.0040779114,0.014152527,-0.0069847107,0.033447266,-0.05239868,0.015533447,0.008743286,-0.007118225,-0.018081665,-0.014770508,-0.01826477,0.016159058,-0.00040245056,-0.0042266846,0.045684814,0.005897522,0.030807495,-0.018463135,-0.025222778,0.0059547424,-0.02798462,-0.020126343,0.014289856,-0.0068092346,0.00028586388,0.015068054,-0.0158844,0.030181885,-0.03286743,0.01574707,0.01235199,0.0019512177,-0.0026721954,-0.022857666,-0.011192322,-0.009231567,-0.011756897,0.009140015,-0.011245728,0.050354004,0.021469116,0.027313232,0.050476074,0.0154418945,-0.0048561096,-0.044403076,-0.029205322,-0.0069770813,-0.01689148,0.007965088,-0.014030457,0.054107666,0.033721924,0.003780365,0.033599854,0.029067993,0.03970337,-0.0017814636,0.013900757,-0.010025024,0.018234253,-0.0047073364,0.026672363,-0.004928589,0.03930664,-0.041931152,0.026504517,0.012588501,0.028015137,-0.015136719,0.03488159,0.060058594,0.0234375,-0.006576538,0.05038452,-0.0065994263,-0.0065460205,-0.009635925,-0.017562866,0.042419434,0.0049591064,0.040893555,0.047729492,0.011672974,-0.0024547577,0.019302368,-0.028915405,-0.02243042,0.061767578,0.024459839,-0.02154541,-0.012580872,0.0018062592,0.005531311,-0.04840088,-0.02128601,0.022125244,-0.0054893494,0.005455017,-0.0021762848,-0.010612488,-0.013473511,-0.008636475,0.021224976,0.013504028,-0.014060974,0.030914307,0.025802612,0.0023002625,0.029388428,-0.0022354126,0.026763916,-0.028762817,-0.027496338,0.020736694,0.025375366,-0.00642395,-0.009727478,0.027420044,0.008476257,0.043945312,0.04244995,-0.020492554,0.005207062,0.03112793,0.013557434,-0.0020198822,0.058776855,0.033599854,0.014732361,0.03363037,0.026763916,0.031341553,-0.048583984,0.020217896,0.0054626465,0.015403748,-0.013580322,-0.01864624,0.0052452087,-0.013435364,0.027542114,-0.00843811,-0.013252258,0.027313232,0.016616821,-0.010177612,-0.0024318695,0.0012989044,0.012199402,-0.021224976,-0.0041236877,0.009384155,-0.013092041,0.042175293,0.011550903,0.0289917,-0.022094727,0.031585693,0.00019991398,-0.0178833,-0.013771057,0.020217896,-0.043914795,0.004753113,-0.0068626404,-0.005317688,-0.045013428,0.008087158,0.026428223,-0.008262634,0.025115967,0.012168884,0.0029258728,-0.0067634583,0.03213501,0.008903503,0.001742363,-0.0031204224,-0.024169922,0.025131226,0.040893555,-0.0032978058,0.0010604858,-0.028503418,0.002500534,0.0044441223,-0.013046265,0.0052604675,-0.006500244,-0.026443481,-0.01878357,0.0158844,0.032714844,0.025650024,0.052124023,-0.026412964,-0.017852783,0.008682251,0.03878784,-0.0014657974,-0.0049057007,-0.009712219,0.028015137,-0.023117065,0.043121338,0.03491211,0.0075035095,0.03845215,0.0020198822,-0.012527466,0.013191223,-0.010398865,0.027755737,-0.016601562,0.0064353943,-0.0058059692,0.026870728,-0.013679504,-0.038635254,0.009048462,-0.01525116,-0.027786255,-0.020462036,0.018310547,0.0021915436,0.032348633,0.03665161,0.02104187,-0.02633667,0.059509277,-0.015235901,0.045837402,0.0016975403,-0.010795593,0.054107666,0.020584106,0.027008057,0.023132324,0.014228821,-0.03387451,0.019683838,0.030578613,0.026107788,0.008903503,0.004333496,-0.017974854,0.038146973,-0.0018386841,0.03567505,-0.0034103394,0.002319336,0.011497498,0.0028266907,-0.016433716,-0.0053215027,-0.008415222,0.010414124,0.04260254,-0.021713257,-0.018447876,-0.021270752,-0.01725769,0.03302002,-0.0095825195,-0.0012178421,-0.00024724007,-0.01600647,0.0020065308,-0.023513794,-0.026062012,0.0048446655,0.024658203,-0.054229736,-0.013473511,0.0065841675,0.025741577,-0.02949524,0.034973145,0.023406982,-0.0032920837,0.0052871704,0.04498291,-0.008728027,0.026931763,-0.016311646,0.02861023,0.033233643,0.011672974,-0.011459351,0.0031814575,0.0032310486,-0.0069465637,0.020965576,0.030548096,-0.01675415,0.0069770813,0.0022182465,-0.0033016205,0.003063202,0.00440979,-0.005748749,0.006778717,-0.01448822,-0.01612854,0.0014238358,0.012039185,0.0012807846,0.0048065186,-0.008773804,-0.015007019,0.0074501038,0.03564453,0.017456055,-0.032104492,0.0014314651,0.0012674332,0.0064697266,-0.020111084,-0.011428833,0.0024757385,-0.04248047,0.015052795,0.020446777,0.011138916,0.011932373,-0.028564453,-0.00055217743,0.020706177,0.0061569214,0.019744873,-0.0000067949295,-0.0013637543,0.009246826,-0.0073776245,-0.008041382,-0.0062026978,-0.010665894,0.009483337,0.026123047,0.0008845329,-0.033477783,0.029953003,0.004142761,0.005634308,-0.008964539,-0.012031555,0.017868042,-0.008346558,-0.00018978119,0.0002039671,0.011489868,-0.013511658,-0.010147095,-0.010375977,0.041778564,0.05908203,-0.008010864,-0.018859863,0.018447876,0.016784668,0.016418457,0.034851074,-0.0023536682,0.04876709,0.017654419,-0.018753052,-0.022384644,0.020385742,-0.01083374,-0.022842407,0.017974854,-0.01133728,-0.0030536652,0.015419006,0.006088257,0.002779007,-0.033721924,-0.011680603,-0.013000488,-0.02027893,0.014831543,-0.0058555603,0.018341064,-0.030349731,-0.011184692,0.013000488,-0.026535034,-0.04537964,-0.017715454,-0.0018854141,-0.018218994,-0.056396484,0.0068473816,-0.023025513,0.003993988,-0.024856567,0.0061569214,-0.01399231,0.021896362,-0.010948181,-0.0131073,0.0039367676,0.023529053,0.027420044,-0.006275177,0.024810791,-0.0362854,-0.015144348,-0.0234375,0.017715454,-0.018127441,0.022155762,-0.0070762634,0.031219482,0.023803711,-0.009887695,-0.001531601,-0.014022827,-0.0063705444,-0.008163452,-0.0124435425,-0.02330017,0.032318115,0.011489868,-0.011474609,-0.011054993,0.0362854,-0.0234375,-0.014785767,0.022384644,0.04260254,0.0068359375,0.031066895,-0.0104522705,0.0011501312,-0.017440796,-0.0036468506,-0.015701294,0.008705139,0.0034236908,0.0037059784,-0.007881165,0.0068206787,0.024765015,-0.008766174,0.0020694733,0.041229248,0.008117676,-0.008361816,0.0357666,0.012809753,0.005050659,-0.0068740845,-0.015014648,0.02003479,0.046417236,0.001704216,0.012954712,-0.0055503845,0.010681152,-0.012374878,0.010765076,0.018966675,-0.021438599,-0.044006348,-0.0135269165,-0.039215088,0.025405884,-0.012275696,0.007534027,-0.010925293,0.01449585,-0.015007019,-0.03652954,-0.01675415,0.021865845,0.014640808,-0.0029506683,-0.013763428,0.0109939575,0.013381958,-0.032562256,-0.0043640137,-0.05014038,-0.04156494,-0.014190674,-0.019958496,0.022888184,0.007980347,-0.012313843,0.0028686523,-0.0009775162,0.004814148,0.008239746,0.02558899,-0.005355835,-0.00013375282,0.032104492,0.021209717,-0.016540527,0.019332886,-0.016967773,-0.0012331009,0.008918762,-0.0075416565,0.019470215,-0.018676758,0.02909851,-0.0154418945,-0.00756073,0.023590088,-0.002565384,0.01600647,-0.028564453,0.0011100769,-0.0009717941,-0.009780884,0.034362793,-0.03112793,-0.022903442,0.007171631,-0.015380859,-0.02760315,-0.000023782253,0.018234253,0.04159546,-0.012207031,0.042236328,-0.024032593,-0.002670288,0.020736694,0.010787964,-0.015472412,0.011734009,0.0368042,0.005306244,-0.0056877136,-0.0031108856,-0.0048980713,-0.030059814,-0.009666443,0.017486572,-0.0034694672,-0.016983032,0.03515625,0.016830444,0.044158936,-0.0074310303,0.017288208,0.010406494,-0.00095558167,0.028793335,0.0052261353,0.06072998,-0.002538681,-0.029586792,0.0068740845,0.004512787,-0.030059814,0.005962372,-0.005420685,0.0014047623,-0.04272461,0.006401062,-0.0010032654,0.015609741,-0.018157959,0.014343262,-0.022979736,-0.0049934387,-0.043151855,-0.0041503906,-0.035247803,0.009422302,0.0309906,0.009132385,0.026565552,-0.0015735626,-0.02420044,0.026168823,0.054016113,-0.006378174,-0.029769897,-0.025650024,0.0063934326,-0.008171082,0.014808655,0.0022144318,-0.023086548,-0.018478394,-0.007820129,-0.015548706,0.00806427,-0.0061569214,0.017089844,0.013191223,-0.0054512024,-0.0027809143,0.022460938,-0.01235199,-0.008079529,0.015090942,0.005241394,0.034362793,0.036956787,-0.019012451,0.020187378,0.013397217,-0.04876709,0.055755615,-0.0017328262,0.035949707,-0.021255493,0.009269714,-0.033050537,-0.024032593,-0.024261475,0.0010595322],"createdAt":"2026-04-18T18:49:26.388Z","updatedAt":"2026-04-23T05:01:21.697Z","lastSeenAt":"2026-04-23T05:01:21.697Z","tsv":"'/api':187 '/api/v1/payments/10':111 '/docs':185 '/pricing':186 '/readme':189 '/request':13,30 '0.02':12,29,62,141,177 '0x8335':135 '20000':129 '2913':136 '402':226 '6':145 'Base network API' 'USDC API' 'accept':119 'access':104,117 'across':50 'advertis':125 'ai-inference' 'ai/ml':53 'also':149 'analysi':154 'analyt':52 'api':5,15,22,32,41,80,116 'attach':91 'avail':215 'base':8,25,70,130,138 'bodi':240 'broad':46 'call':4,21 'caller':89 'challeng':124,231 'classif':157 'classification' 'commit':88 'confirm':223 'connect':195 'content':201 'contract':134 'convers':169 'cost':61 'crawl':218 'crypto-paid API' 'crypto-quotes' 'data':51,171 'data-analytics' 'decim':146 'document':180,210,234 'embed':158 'embeddings' 'enabl':40 'endpoint':49,60,106,109,151,221,243 'equal':140 'estim':166 'everi':59 'exampl':214 'exchang':161 'expect':244 'expos':150 'extrem':182 'feed':160 'finance-data' 'finance/web3':55 'gas':165 'generat':172 'geocod':167 'geocoding' 'given':142 'header':96 'infer':54 'key':16,33,81 'limit':84 'list':113 'live':224 'lowpaymentfee' 'lowpaymentfee.com':35 'maxamountrequir':127 'micropayment API' 'network':9,26,71 'no-api-key' 'offer':44 'openapi':205 'page':190,219 'paid':65 'pay':2,19 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request' 'payment':75,95,101 'per':3,20,63 'platform':6,23,42,148 'point':179 'post':120 'premium':115 'price':159,178 'prompt':197 'proof':102 'protocol':76 'quot':164 'rate':83,162 'render':192 'request':64,121,239 'request/response':208 'requir':17,34 'respons':247 'return':225,249 'schema':209 'sentiment':153 'sentiment-analysis' 'serverless API access' 'servic':58 'set':47 'simpli':90 'spars':183 'spec':206 'specif':108,242 'subscript':87 'summar':156 'text':155 'text-summarization' 'token':163 'unclear':237 'unit':131 'usag':213 'usdc':67,133,143 'usdc-base-network' 'use':72 'util':57 'utility-services' 'valid':99,168,229 'via':10,27 'wallet':196 'without':233 'x':94 'x-payment':93 'x402':11,28,39,74,100,123,230 'x402 API' 'x402-enabled':38 'x402-payment'","prices":[{"id":"9b35cc48-492a-4d51-a5f9-60418d7c49d4","listingId":"cd16c4e6-b823-4db1-bd6d-189ca8a63ee2","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/payments/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:49:26.388Z"}],"sources":[{"listingId":"cd16c4e6-b823-4db1-bd6d-189ca8a63ee2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:49:26.388Z","lastSeenAt":"2026-04-23T05:01:21.697Z"}],"details":{"listingId":"cd16c4e6-b823-4db1-bd6d-189ca8a63ee2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/10 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge for /api/v1/payments/10 advertises maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/10"},{"claim":"Available endpoint categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time crypto token quotes and gas estimates with per-call payment","Running geocoding or data validation utilities on a pay-as-you-go basis","Exporting analytics data or generating reports without a subscription"],"bestFor":["Agents and developers who want zero-setup, pay-per-call API access","Use cases requiring no rate limits and no upfront commitments","Crypto-native workflows already operating on the Base network"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads where $0.02/request adds up significantly","Developers who cannot or prefer not to pay in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:09.879Z"},"updatedAt":"2026-04-23T05:01:21.697Z"}}