{"id":"a14c9b7f-e13a-4fbc-a450-c3761959bf19","shortId":"BFGuZw","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/products/90` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises multiple API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request and settle in USDC on Base.\n\nHowever, the specific functionality behind `/api/v1/products/90` (\"Premium API Access\") is not documented beyond its title. There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. The endpoint is live and responds with a valid x402 challenge, but what data or service it actually returns upon successful payment is unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","no-rate-limit","json-response"],"categories":["api-marketplace","crypto"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No documentation available — docs, pricing, and API pages render only 'Connect wallet' with no content","The specific endpoint /api/v1/products/90 ('Premium API Access') has no description of what data or service it provides","No OpenAPI or output schema beyond basic HTTP method info","Cannot verify what response is returned after successful payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/90","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/products/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the endpoint actually returns. No OpenAPI schema, no request/response examples, and the docs pages are empty beyond a wallet-connect prompt. The specific product (id 90) is not described anywhere on the site. Pricing is clear ($0.02 USDC on Base) but the service behind the paywall is opaque.","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":"2026-04-18T23:19:31.004Z","embedding":[-0.014656067,-0.040771484,0.02949524,0.022521973,0.015426636,-0.024978638,-0.018676758,0.04067993,0.07940674,-0.0602417,0.032287598,-0.05819702,-0.03338623,-0.02583313,-0.021957397,0.015335083,0.009147644,0.010269165,-0.045837402,0.032806396,0.023071289,-0.00046896935,-0.0390625,0.029907227,0.014572144,-0.01436615,-0.0009698868,0.011489868,-0.0066108704,-0.038024902,0.0385437,-0.028045654,-0.009277344,0.01424408,-0.00894928,-0.021392822,-0.0008673668,0.04727173,0.045928955,0.004219055,-0.0008430481,-0.06359863,0.008415222,-0.028549194,-0.03945923,0.005962372,0.013008118,-0.02909851,0.002023697,-0.013893127,-0.02949524,0.0028476715,-0.016555786,-0.005279541,0.003528595,0.0121536255,-0.0042915344,0.006679535,-0.00045394897,0.019882202,0.0010604858,-0.060546875,-0.010505676,-0.013839722,0.0032215118,0.060760498,-0.01576233,0.02507019,0.002275467,0.07299805,0.03741455,0.05432129,0.04248047,0.018615723,-0.009765625,0.002368927,-0.010772705,0.05038452,-0.00062417984,-0.012046814,-0.008071899,-0.0045700073,-0.046539307,-0.0021018982,-0.018463135,-0.042816162,-0.016342163,0.028839111,-0.014572144,0.021835327,-0.06488037,0.0012540817,-0.029891968,-0.008010864,-0.01134491,-0.010398865,-0.0101623535,0.038330078,0.002105713,0.015701294,-0.014091492,-0.033813477,0.010757446,0.014060974,0.027648926,0.04345703,0.032104492,0.017410278,0.0014705658,-0.029251099,-0.015853882,0.01197052,-0.013496399,-0.00749588,0.019515991,0.010177612,-0.014350891,0.02130127,-0.028701782,0.029464722,-0.05053711,0.055999756,0.0033855438,-0.007896423,0.0050468445,-0.025680542,-0.020004272,0.02456665,-0.014770508,-0.020446777,0.038146973,0.00207901,0.019699097,-0.028839111,-0.03717041,0.025543213,-0.012245178,-0.011253357,-0.04837036,-0.020233154,0.033996582,-0.024154663,0.033416748,0.039123535,-0.088134766,-0.008255005,-0.036743164,0.0014352798,-0.038208008,-0.007850647,-0.002532959,0.014572144,-0.01625061,-0.020065308,-0.03036499,-0.03616333,0.006958008,0.041412354,-0.008369446,0.046203613,-0.024536133,0.018814087,0.019104004,0.00051641464,0.0211792,0.022415161,-0.003232956,-0.07873535,-0.07531738,-0.025497437,-0.013130188,-0.0012187958,-0.025115967,0.0073394775,0.008651733,-0.07330322,-0.015899658,-0.009399414,0.0033874512,-0.042663574,-0.0015172958,-0.03793335,0.014839172,-0.02041626,-0.054901123,-0.0149002075,-0.037963867,0.056732178,0.0154418945,0.015670776,0.018371582,-0.016601562,0.05987549,0.008781433,-0.011810303,-0.030075073,0.017913818,-0.021942139,0.021591187,-0.004802704,0.028945923,-0.023162842,0.045013428,0.06365967,-0.000626564,-0.015838623,-0.005290985,-0.059936523,-0.042663574,-0.020462036,0.018875122,0.01876831,-0.010986328,0.04800415,-0.03265381,-0.038635254,0.009765625,0.016525269,0.021255493,0.07110596,-0.0009870529,-0.017028809,0.018936157,0.02708435,-0.047027588,0.04135132,0.027374268,0.010826111,-0.02734375,-0.0435791,0.025756836,0.04324341,-0.02142334,0.00793457,-0.026229858,0.027557373,0.0070533752,-0.0067443848,0.00957489,-0.020233154,-0.005290985,-0.039245605,-0.0104599,0.02709961,0.01260376,-0.03756714,-0.037261963,-0.078186035,0.05810547,0.022888184,0.044006348,0.0037326813,0.0060920715,-0.020614624,-0.016601562,-0.0703125,0.04977417,0.06951904,-0.007850647,-0.009895325,0.013687134,-0.005748749,-0.02482605,0.0014009476,-0.015792847,-0.021606445,-0.007827759,0.017990112,-0.043670654,0.0071640015,0.031311035,0.019302368,0.04156494,-0.005809784,-0.039855957,-0.016799927,-0.003068924,-0.0046424866,-0.022918701,0.013122559,-0.0058937073,-0.001452446,0.000767231,-0.0040626526,0.02420044,0.002286911,0.012870789,0.0049591064,-0.011184692,-0.0052948,-0.022888184,0.018325806,0.005138397,-0.06402588,0.012382507,-0.00699234,0.07055664,-0.05014038,0.041259766,-0.01096344,0.037597656,0.048980713,-0.0024051666,-0.03955078,-0.00076150894,0.034576416,0.020370483,0.032714844,0.019165039,-0.028366089,-0.003774643,0.078063965,-0.011375427,-0.005180359,0.016433716,0.009346008,0.043273926,-0.0060806274,-0.049072266,-0.023635864,0.0007624626,-0.048919678,0.027923584,-0.01939392,0.04244995,-0.024536133,-0.00091171265,-0.012832642,0.0012607574,-0.050964355,0.0024967194,-0.006793976,0.0056533813,-0.024002075,-0.018249512,0.007511139,0.022369385,-0.013671875,0.012702942,0.012863159,0.030548096,-0.010749817,-0.04547119,-0.024551392,-0.0037136078,0.0034542084,0.027526855,0.017837524,0.019073486,0.0423584,-0.02822876,-0.00046658516,0.02268982,0.005455017,0.03265381,-0.008201599,0.00096940994,-0.05834961,-0.051605225,-0.029129028,-0.041748047,0.023025513,0.017288208,-0.0129852295,0.04776001,0.0031166077,-0.012283325,-0.046691895,0.031341553,-0.052764893,0.0049934387,0.041015625,-0.016403198,-0.031982422,0.005958557,-0.004386902,-0.00063610077,0.039764404,0.016159058,0.044128418,0.06976318,0.045684814,0.006603241,0.035095215,0.011932373,0.01777649,0.01499176,-0.019607544,-0.037963867,-0.020095825,0.02848816,-0.027679443,-0.023101807,-0.07672119,0.05154419,0.025848389,0.0892334,0.015129089,0.01626587,0.044281006,-0.012031555,0.014663696,-0.009605408,-0.008659363,-0.023971558,-0.036224365,0.023910522,-0.013084412,0.0033512115,-0.016647339,0.034362793,-0.013641357,0.0184021,-0.014205933,0.05267334,-0.00422287,-0.01586914,0.015960693,0.0074920654,0.05117798,0.051818848,-0.047607422,0.022979736,0.034484863,-0.029281616,0.0090789795,0.036010742,-0.016921997,-0.029525757,-0.0574646,-0.023361206,-0.008018494,0.0059928894,-0.046722412,0.0043182373,0.0042381287,-0.002986908,0.022354126,-0.015548706,-0.010353088,0.010444641,-0.009757996,-0.060333252,0.0069847107,-0.02456665,-0.0050964355,0.040985107,-0.021530151,-0.014091492,0.010566711,-0.011550903,-0.003414154,0.0077323914,0.01637268,0.0127334595,-0.03225708,0.021759033,0.01096344,0.008613586,0.024719238,0.025146484,0.03817749,0.026000977,0.04598999,0.02760315,-0.0184021,-0.034973145,0.0084991455,-0.040496826,-0.009635925,0.0075645447,-0.018096924,0.01474762,-0.034698486,-0.03262329,-0.015403748,0.019042969,-0.022781372,0.01625061,0.03237915,-0.01360321,-0.030639648,-0.06097412,-0.029541016,-0.0109939575,0.06768799,0.0158844,-0.0015764236,-0.06451416,-0.008338928,0.0181427,0.0071487427,0.030075073,-0.014656067,-0.010826111,-0.028289795,-0.036071777,-0.015625,-0.03302002,0.036499023,-0.0033473969,-0.0077209473,0.01637268,-0.0070533752,0.024871826,-0.009628296,0.017730713,0.020843506,-0.0178833,-0.002565384,-0.014312744,0.03945923,0.013397217,-0.007659912,-0.048217773,0.04486084,-0.0063095093,0.03265381,-0.044006348,-0.0032520294,-0.019378662,0.0062332153,0.017547607,0.0012979507,-0.01058197,-0.009918213,-0.051086426,-0.065979004,0.032104492,-0.02357483,0.033416748,0.028396606,0.0012493134,0.040985107,-0.0069847107,-0.004852295,0.012931824,-0.031311035,-0.010116577,-0.019439697,-0.034576416,-0.035308838,-0.008850098,-0.024719238,0.021484375,-0.01953125,0.023086548,0.002614975,-0.01586914,0.026916504,-0.0024471283,0.004055023,0.021530151,0.0064353943,0.029464722,0.03817749,0.0023975372,-0.047912598,0.015792847,-0.015808105,0.014404297,0.0038642883,0.034210205,0.035949707,-0.0030460358,-0.0062561035,-0.012710571,-0.021606445,-0.031799316,-0.0010681152,0.010635376,0.018096924,0.005821228,-0.028839111,0.009002686,0.013893127,-0.02166748,-0.034088135,0.014259338,0.026779175,-0.036010742,0.014984131,0.02468872,0.04650879,-0.025817871,-0.004322052,0.0008454323,0.020858765,0.03753662,0.01689148,-0.019042969,0.017868042,-0.016418457,0.0082092285,-0.0062675476,-0.017578125,0.02079773,-0.00064229965,0.013198853,0.020980835,0.009216309,-0.012901306,-0.02720642,0.0019464493,-0.008277893,-0.02142334,0.036315918,0.017303467,0.02935791,-0.028182983,0.021469116,0.02796936,-0.019454956,-0.012512207,-0.02368164,0.04928589,-0.01309967,-0.010063171,0.0036411285,0.018478394,0.037322998,-0.04864502,0.0006303787,0.006248474,0.004234314,-0.02180481,-0.034729004,-0.042907715,0.009017944,0.039520264,0.024276733,0.0070648193,0.036102295,0.015464783,0.024459839,0.035095215,0.008354187,-0.012512207,-0.019485474,-0.037353516,-0.020904541,0.0015935898,0.0052223206,-0.034729004,0.011909485,-0.009788513,-0.026428223,0.010284424,-0.018493652,-0.0038967133,0.0017461777,0.0076408386,0.031829834,0.0029506683,0.021240234,-0.004562378,-0.03491211,0.0048065186,0.0018072128,0.017990112,-0.03869629,0.007881165,-0.009635925,-0.0075416565,0.0041122437,0.019424438,0.022735596,0.02949524,0.016601562,0.04083252,-0.049041748,0.035461426,-0.037719727,0.012710571,-0.0032253265,-0.0446167,-0.011703491,-0.023040771,-0.016418457,0.041046143,-0.018203735,0.0026245117,-0.017868042,-0.026870728,-0.019927979,-0.059448242,0.009994507,0.04067993,0.037841797,-0.019104004,-0.005748749,0.012397766,0.0065994263,-0.019592285,0.0057144165,-0.028625488,0.030563354,0.02180481,-0.007537842,-0.03503418,-0.018630981,-0.023101807,0.015602112,-0.033599854,-0.045532227,-0.015548706,-0.0032634735,-0.013397217,-0.010856628,-0.013893127,-0.02848816,0.0029945374,-0.029754639,0.019424438,0.0016260147,0.01663208,0.011634827,-0.02456665,-0.003818512,0.022125244,-0.021026611,0.056030273,-0.0047454834,0.0057258606,-0.043518066,0.019042969,0.02418518,0.031677246,-0.0005159378,-0.016326904,-0.0014762878,-0.019851685,-0.05810547,-0.005329132,-0.0135650635,-0.017990112,-0.0073661804,-0.014915466,-0.061462402,-0.013511658,-0.021575928,0.011238098,0.012702942,0.023803711,0.0074386597,0.0073394775,0.0017414093,-0.00089788437,0.01007843,-0.034973145,0.019622803,0.010925293,0.0051841736,0.031707764,0.043121338,0.0050239563,-0.008178711,0.011657715,-0.006061554,0.032470703,-0.023513794,0.008399963,-0.017990112,0.015571594,-0.006122589,-0.019744873,-0.03567505,0.0053367615,0.0892334,-0.0059318542,-0.0030117035,-0.012260437,-0.012748718,0.011711121,0.021377563,-0.044067383,-0.0079574585,-0.01789856,0.021194458,-0.009162903,0.014038086,0.0060691833,0.019515991,-0.011734009,-0.04107666,-0.018035889,-0.0023002625,-0.0049209595,-0.053710938,-0.029937744,-0.061920166,-0.0020751953,-0.013259888,-0.027740479,-0.0066452026,0.0020923615,-0.016525269,-0.07318115,0.0072364807,0.05053711,0.009246826,0.026153564,-0.009849548,0.01939392,0.021102905,-0.037841797,-0.008773804,0.028182983,-0.021057129,-0.031097412,-0.02671814,0.016235352,-0.008506775,-0.0072364807,0.0063285828,0.005634308,0.02217102,-0.0043640137,0.006706238,-0.015586853,0.010871887,-0.01084137,0.017059326,-0.017974854,-0.021255493,0.035217285,-0.053131104,0.015281677,0.0060920715,-0.023345947,-0.0005040169,0.019317627,0.040039062,-0.041931152,-0.021881104,0.025894165,0.004623413,0.032348633,-0.026824951,0.05731201,0.0021247864,-0.03173828,0.012283325,-0.016555786,-0.023223877,-0.03881836,-0.025604248,0.011100769,-0.012832642,0.017974854,-0.0211792,-0.0029506683,0.010978699,-0.0009832382,-0.0026760101,-0.019592285,-0.020812988,-0.017349243,0.005836487,-0.0009908676,-0.01576233,0.0033950806,0.026611328,0.029388428,0.046325684,0.0076828003,0.0003938675,0.016082764,0.032226562,-0.010932922,0.002439499,0.018341064,-0.004459381,0.026977539,0.0069847107,0.027267456,-0.04147339,-0.009689331,-0.02355957,-0.012649536,0.006980896,-0.00178051,-0.0045814514,-0.014312744,0.008895874,0.00079250336,-0.036102295,0.0034561157,-0.02508545,-0.031143188,-0.0015249252,-0.027389526,0.02709961,0.004711151,-0.0067749023,0.0077667236,0.0008382797,0.03756714,0.009147644,-0.016815186,0.017700195,0.03189087,0.013458252,-0.02229309,-0.008773804,0.00027441978,0.002981186,0.0016870499,-0.0440979,0.00459671,0.043273926,-0.0090408325,-0.006580353,0.0059509277,0.0309906,-0.0076293945,0.0077285767,-0.0009813309,0.014129639,-0.008476257,0.04788208,-0.048828125,0.018173218,0.013122559,0.009025574,-0.0079422,-0.014076233,-0.036010742,0.017822266,0.0052375793,-0.011512756,0.05267334,0.0016031265,0.032989502,-0.015296936,-0.04034424,0.006046295,-0.015655518,-0.015098572,0.024398804,-0.025817871,0.0047302246,0.014152527,-0.030090332,0.044189453,-0.044067383,0.010101318,0.005279541,-0.00415802,0.0066566467,-0.01222229,-0.015411377,0.008865356,-0.013450623,0.004951477,0.0034999847,0.04925537,0.017333984,0.02571106,0.05886841,0.013870239,0.00818634,-0.04711914,-0.032806396,-0.009605408,-0.023849487,0.026733398,-0.0256958,0.07385254,0.027130127,0.0029773712,0.040374756,0.018859863,0.025863647,0.0015869141,0.017654419,-0.012748718,0.016021729,-0.0116119385,0.033355713,0.0026855469,0.03262329,-0.03378296,0.03451538,0.008354187,0.026000977,-0.034118652,0.02986145,0.073913574,0.024749756,-0.0046043396,0.04284668,-0.0028533936,-0.014060974,-0.015510559,-0.015335083,0.06072998,0.014335632,0.047058105,0.047912598,0.005458832,0.0034675598,0.019378662,-0.026947021,-0.033966064,0.064697266,0.028121948,-0.023635864,-0.0096588135,0.0047683716,0.014717102,-0.048950195,-0.031204224,0.03665161,0.0010004044,0.0033168793,-0.014289856,-0.002822876,-0.012916565,0.00894165,0.017318726,0.0036735535,-0.008369446,0.025222778,0.033599854,-0.00016450882,0.024459839,-0.00919342,0.025680542,-0.03414917,-0.00422287,0.020324707,0.012519836,-0.01084137,-0.011436462,0.020645142,0.005836487,0.02760315,0.04748535,-0.018585205,0.009002686,0.030075073,0.0107040405,-0.009567261,0.04284668,0.041046143,0.006626129,0.034240723,0.027526855,0.028182983,-0.035827637,0.013511658,-0.007221222,0.004714966,-0.011955261,-0.009773254,0.004673004,-0.01927185,0.005012512,-0.003282547,-0.0041542053,0.031799316,0.03427124,0.007411957,-0.0077209473,-0.011428833,0.014183044,-0.013404846,-0.0085372925,0.010406494,-0.005126953,0.035308838,0.017410278,0.026672363,-0.024551392,0.01537323,-0.0024757385,-0.015296936,0.00730896,0.008140564,-0.03970337,0.015037537,-0.0062713623,0.0044288635,-0.05810547,0.007827759,0.03616333,-0.006881714,0.024276733,0.01687622,-0.008125305,-0.006881714,0.031707764,0.015022278,-0.0041122437,-0.008255005,-0.015960693,0.022415161,0.04458618,-0.015319824,0.0030231476,-0.021469116,-0.008674622,0.001241684,-0.014129639,-0.004261017,0.003314972,-0.0068206787,-0.03152466,0.022216797,0.034057617,0.019989014,0.056365967,-0.009681702,0.0051116943,0.0028381348,0.039398193,0.010261536,0.0050086975,0.00030088425,0.017730713,-0.012016296,0.059936523,0.024047852,0.008605957,0.021621704,-0.017959595,-0.010040283,0.010040283,-0.021469116,0.025802612,-0.018112183,-0.0031871796,-0.0021133423,0.038116455,-0.008277893,-0.044891357,0.011955261,-0.01713562,-0.014549255,-0.019454956,0.006454468,0.00060653687,0.022384644,0.039154053,0.021148682,-0.036193848,0.05883789,-0.017028809,0.056518555,-0.017837524,-0.01373291,0.047790527,0.016799927,0.043121338,0.01612854,0.016052246,-0.031982422,0.016845703,0.031585693,0.03540039,0.0030021667,0.0059547424,-0.012420654,0.044555664,-0.014892578,0.028259277,-0.0042381287,0.0010004044,0.016677856,-0.000031888485,-0.0031642914,-0.0057258606,-0.0042266846,0.012161255,0.04220581,-0.03527832,-0.0031738281,-0.022918701,-0.014289856,0.019073486,-0.013404846,0.007858276,0.0067825317,-0.0357666,0.015274048,-0.034942627,-0.022781372,0.011009216,0.021743774,-0.038726807,0.007472992,0.0062294006,0.013969421,-0.022979736,0.0362854,0.014480591,-0.0012140274,0.01626587,0.05126953,0.0004477501,0.033203125,-0.0019216537,0.024765015,0.044708252,-0.005683899,-0.017852783,0.007209778,0.018356323,-0.014038086,0.007686615,0.032958984,-0.0077400208,0.0067443848,0.00023639202,-0.0022411346,-0.0055389404,0.022232056,-0.0034561157,0.008979797,-0.020904541,-0.011108398,0.008728027,0.0020809174,-0.00022244453,0.0044403076,0.00031995773,-0.007255554,0.014877319,0.035614014,0.019195557,-0.030014038,-0.009613037,0.0036315918,0.014602661,-0.021774292,-0.023529053,-0.011833191,-0.029251099,0.011405945,0.012702942,0.013549805,0.012374878,-0.023117065,-0.00023925304,0.029251099,0.025466919,0.003873825,0.005050659,-0.0023593903,0.008354187,-0.022598267,-0.002544403,-0.007030487,-0.0011558533,0.0039024353,0.020401001,0.0008921623,-0.027023315,0.0132369995,0.0025691986,0.010261536,-0.0048332214,-0.029144287,0.033569336,-0.0053367615,-0.0026626587,-0.0018091202,0.0031795502,-0.012275696,-0.010307312,-0.015258789,0.052703857,0.051513672,-0.015686035,-0.015007019,0.01876831,0.023590088,0.021759033,0.034942627,-0.00844574,0.049682617,0.016601562,-0.02029419,-0.02520752,0.039489746,-0.015571594,-0.029724121,0.0036411285,-0.016235352,-0.014732361,0.007484436,0.010925293,-0.0021514893,-0.0236969,-0.021621704,-0.0138549805,-0.005378723,0.038238525,-0.0046691895,0.0055503845,-0.018157959,-0.014289856,0.012962341,-0.023025513,-0.056884766,-0.02217102,-0.008728027,-0.016357422,-0.0574646,0.006702423,-0.025360107,0.0085372925,-0.020874023,-0.004081726,-0.017822266,0.009605408,-0.017837524,0.003993988,0.017822266,0.027374268,0.022064209,0.0030345917,0.019180298,-0.019729614,-0.025756836,-0.032104492,-0.0077590942,-0.0076026917,0.018295288,0.010917664,0.03857422,0.022766113,-0.0011396408,-0.0013751984,-0.006679535,0.0011863708,-0.01586914,-0.028701782,-0.033966064,0.025024414,0.012397766,-0.008972168,-0.011924744,0.050476074,-0.023605347,-0.014984131,0.029891968,0.04257202,0.01158905,0.028625488,-0.0112838745,-0.010108948,-0.016052246,0.004219055,-0.017929077,0.005332947,0.013267517,0.0005130768,-0.008964539,0.004524231,0.017532349,-0.010955811,0.0054779053,0.0340271,0.00881958,-0.005290985,0.040100098,0.015625,0.0008749962,-0.0064201355,-0.012191772,0.014984131,0.05355835,0.014335632,-0.003250122,0.0025157928,0.005104065,-0.008659363,0.005542755,0.0074386597,-0.013175964,-0.046325684,-0.020980835,-0.028671265,0.030731201,-0.0022583008,0.014381409,-0.009803772,0.017318726,-0.005718231,-0.024978638,-0.031066895,0.028579712,0.015686035,-0.022888184,-0.016067505,0.013801575,0.013114929,-0.043670654,-0.005470276,-0.032928467,-0.022705078,-0.0034217834,-0.031341553,0.028076172,0.022232056,-0.012779236,0.00024437904,-0.0031261444,-0.0069274902,-0.0041999817,0.03387451,-0.013404846,-0.0032520294,0.036865234,0.018005371,-0.022506714,0.015930176,-0.007972717,0.00038528442,0.007820129,-0.008987427,0.016921997,-0.020095825,0.03237915,-0.011955261,-0.02178955,0.03414917,0.0024681091,0.01449585,-0.033203125,0.0057525635,-0.0051460266,-0.0071105957,0.03152466,-0.029327393,-0.021377563,0.011650085,-0.024642944,-0.025466919,0.007091522,0.023620605,0.015701294,-0.01878357,0.04019165,-0.019104004,-0.020599365,0.01965332,0.011024475,-0.011436462,-0.0035419464,0.043792725,-0.00819397,-0.010116577,0.009689331,-0.022232056,-0.017974854,-0.008033752,0.018096924,-0.015007019,-0.015411377,0.023925781,0.0057640076,0.046875,-0.0044898987,0.019729614,0.01776123,-0.0063972473,0.024551392,0.007827759,0.05026245,0.008583069,-0.019165039,0.01889038,0.0044021606,-0.026000977,0.00289917,-0.0028209686,0.008674622,-0.037078857,0.02305603,-0.0056915283,0.018707275,-0.019500732,0.0073013306,-0.019119263,0.0021457672,-0.031829834,0.013946533,-0.021652222,0.012336731,0.03869629,0.013397217,0.022567749,-0.003232956,-0.025222778,0.019958496,0.05847168,-0.0154953,-0.034210205,-0.008735657,0.008911133,-0.00497818,0.014007568,0.00705719,-0.029647827,-0.01902771,0.010887146,-0.014434814,-0.00036549568,0.0059280396,0.022537231,0.0072364807,-0.00187397,-0.01335907,0.02709961,-0.011665344,0.005264282,0.012702942,0.0067367554,0.025100708,0.017044067,-0.016937256,0.019454956,0.014930725,-0.050231934,0.057617188,-0.0023117065,0.015510559,-0.017227173,0.014091492,-0.043701172,-0.016586304,-0.009147644,0.009101868],"createdAt":"2026-04-18T18:37:49.398Z","updatedAt":"2026-04-23T12:05:08.502Z","lastSeenAt":"2026-04-23T12:05:08.502Z","tsv":"'/api/v1/products/90':56,159 '/call':13,28 '0.02':12,27,78,145 '000':72 '20':71 '402':66 '402 payment api' 'accept':46 'access':62,162 'actual':212 'addit':193 'advertis':102 'ai':114 'analysi':118 'analyt':108 'api':5,20,38,61,82,104,161,182 'attach':91 'base':8,23,51,73,153 'base network api' 'behind':158 'beyond':166 'broader':100 'call':80 'caller':89 'categori':105 'challeng':67,205 'classif':121 'connect':188 'content':194 'convers':138 'data':107,111,208 'doc':179 'document':165 'embed':122 'endpoint':55,141,196 'estim':132 'exampl':176 'exchang':127 'export':112 'feed':126 'financ':123 'function':157 'gas':131 'generat':139 'geocod':136 'header':95 'howev':154 'i.e':77 'includ':106 'infrastructur':134 'insight':113 'json-response' 'key':83 'learn':116 'limit':86 'list':58 'live':198 'low payment fee' 'lowpaymentfee.com':31 'machin':115 'metric':109 'micropayment api' 'multipl':103 'network':9,24,52 'no-api-key' 'no-rate-limit' 'openapi':172 'page':183 'pay':2,17,35 'pay per call api' 'pay-per-request':1,16,34 'payment':48,94,216 'per':3,18,36,79,146 'platform':6,21,39,101 'premium':60,160 'price':125,143,180 'prompt':190 'protocol':44 'quot':130 'rate':85,128 'render':185 'report':110 'request':4,19,37,68,98,147 'request/response':175 'requir':88 'respond':200 'return':64,213 'schema':173 'sentiment':117 'servic':210 'settl':149 'simpli':90 'specif':54,156 'success':215 'summar':120 'text':119 'titl':168 'token':129 'unclear':218 'unit':74 'upon':214 'usdc':15,30,47,76,151 'usdc api' 'usdc-base' 'use':41 'util':135 'valid':137,203 'via':10,25 'wallet':189 'web3':124 'x402':11,26,43,93,204 'x402 api' 'x402-payment'","prices":[{"id":"2215140b-6282-40a3-af15-5d0ae486d724","listingId":"a14c9b7f-e13a-4fbc-a450-c3761959bf19","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/products/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:49.398Z"}],"sources":[{"listingId":"a14c9b7f-e13a-4fbc-a450-c3761959bf19","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:49.398Z","lastSeenAt":"2026-04-23T12:05:08.502Z"}],"details":{"listingId":"a14c9b7f-e13a-4fbc-a450-c3761959bf19","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/90 \\\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":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base","source_url":"https://lowpaymentfee.com/api/v1/products/90"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/products/90"}],"useCases":["Programmatic access to a premium API resource via x402 micropayments","Agent-driven API consumption without pre-registration or API keys","Paying per request in USDC on Base for on-demand data or services"],"bestFor":["Developers or agents wanting zero-signup, pay-as-you-go API access","x402-compatible wallets and agent frameworks on Base","Low-cost micropayment API experimentation"],"notFor":["Users who need detailed documentation or guaranteed SLAs before purchasing","Use cases requiring free or subscription-based access rather than per-call payments","Anyone needing to know the exact response schema before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.833Z"},"updatedAt":"2026-04-23T12:05:08.502Z"}}