{"id":"c4e6698d-a21b-4350-ad7c-4aaec193d4ae","shortId":"bZALQc","kind":"x402","title":"Pay-per-request API collection on Base via x402 — $0.02/call in USDC, no API keys required.","tagline":"Pay-per-request API collection on Base via x402 — $0.02/call in USDC, no API keys required.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/collections/26` is labeled \"Premium API Access\" and accepts POST requests, settling payments in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.\n\nThe broader platform offers endpoints across four categories: 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 listed at the same $0.02/request price point.\n\nThe platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is handled entirely through the x402 protocol's X-PAYMENT header mechanism on the Base L2 network. Documentation pages beyond the landing page were largely empty (showing only a \"Connect wallet\" prompt), so details about request/response schemas for individual endpoints are not available from the crawled material.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","no-api-key"],"categories":["api-marketplace","llm","finance","geo"],"synonyms":["low payment fee","x402 api","pay per request api","micropayment api","usdc api","base network api","lowpaymentfee"],"warnings":["No API documentation available — all doc pages return only a 'Connect wallet' prompt with no content","No request or response schema provided for this endpoint or any other endpoint on the platform","The purpose of /api/v1/collections/26 ('Premium API Access') is not explained anywhere in the crawled material","Cannot verify what actual data or functionality any of these endpoints provide"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/26","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/collections/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation for request/response formats, and the /docs, /pricing, /api, and /README pages are all empty beyond a wallet-connect prompt. The specific purpose of `/api/v1/collections/26` (\"Premium API Access\") is ambiguous — it's unclear what data or functionality it returns. 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":"2026-04-19T17:54:01.254Z","embedding":[-0.015182495,-0.040496826,0.043395996,0.009933472,0.020217896,-0.026763916,-0.02444458,0.03427124,0.04800415,-0.07513428,0.021026611,-0.06323242,-0.034606934,-0.032928467,-0.010391235,0.022338867,0.020996094,-0.0054130554,-0.044281006,0.040740967,0.016403198,-0.010169983,-0.025756836,0.018676758,-0.008872986,-0.0099487305,0.0051498413,0.0020141602,-0.022476196,-0.052978516,0.034729004,-0.026245117,-0.011123657,0.032684326,-0.0036678314,0.0002641678,-0.014045715,0.05480957,0.01928711,-0.00076675415,-0.006111145,-0.055114746,0.021606445,-0.0017633438,-0.0602417,-0.005180359,0.024291992,-0.035217285,-0.00957489,0.018798828,-0.03225708,0.011619568,-0.015182495,0.0030765533,0.017868042,0.005607605,-0.015274048,-0.002981186,0.0143585205,0.01399231,0.01576233,-0.044311523,-0.014045715,0.0045166016,0.006286621,0.05935669,-0.011245728,0.056427002,0.00087213516,0.08026123,0.02748108,0.051483154,0.035217285,0.0014839172,0.004047394,-0.013626099,-0.00085163116,0.06933594,-0.016952515,-0.016921997,-0.009086609,-0.021347046,-0.03933716,-0.011695862,-0.024902344,-0.05795288,-0.015670776,0.030548096,-0.028762817,0.02923584,-0.0692749,0.0035362244,-0.027374268,0.0073928833,0.009552002,-0.005508423,-0.011459351,0.026290894,-0.0024414062,0.026550293,0.00023674965,-0.047790527,0.014801025,0.016403198,0.038330078,0.057891846,0.014228821,0.024490356,0.00522995,-0.004261017,-0.040496826,0.011169434,-0.013046265,-0.0137786865,0.016677856,0.004142761,-0.025131226,0.014640808,-0.030960083,0.013725281,-0.045959473,0.050933838,0.018676758,-0.00089883804,0.011329651,-0.046661377,-0.024749756,0.007270813,-0.012199402,-0.016693115,0.028503418,0.014541626,0.03857422,-0.0131073,-0.0033302307,-0.000893116,-0.007007599,-0.011947632,-0.05215454,-0.03189087,0.05291748,-0.026138306,0.020095825,0.046844482,-0.088134766,0.005657196,-0.046295166,0.003332138,-0.0095825195,-0.014762878,0.0016994476,0.019958496,-0.027740479,-0.0075263977,-0.026000977,-0.017868042,-0.005344391,0.032989502,0.00027871132,0.050109863,-0.016708374,0.010665894,0.02330017,-0.0019550323,0.029342651,0.033355713,-0.024459839,-0.07556152,-0.08258057,-0.016281128,-0.006248474,-0.004940033,-0.02330017,0.007144928,-0.0061950684,-0.08093262,-0.028900146,-0.0068626404,0.007320404,-0.033477783,-0.009178162,-0.03314209,0.01259613,-0.015701294,-0.0513916,-0.009635925,-0.04486084,0.07141113,0.01838684,0.03375244,0.027450562,-0.005432129,0.04168701,0.03668213,-0.0143966675,-0.035186768,0.022491455,-0.01965332,0.010848999,-0.010055542,0.008659363,-0.0073280334,0.05142212,0.0670166,0.016052246,-0.012664795,-0.013084412,-0.054382324,-0.05303955,-0.041809082,0.019332886,0.017349243,-0.0042533875,0.017929077,-0.046936035,-0.035827637,0.00003373623,0.013442993,-0.0016736984,0.06427002,0.022583008,-0.0066452026,0.03366089,0.023971558,-0.047576904,0.029129028,0.03353882,0.0022296906,-0.02633667,-0.032440186,0.035369873,0.041656494,-0.03451538,0.019332886,-0.016494751,0.020965576,-0.009864807,0.01259613,0.017623901,-0.004722595,-0.020965576,-0.029968262,-0.017211914,0.041168213,0.010185242,-0.029418945,-0.036193848,-0.078552246,0.04675293,0.03439331,0.03744507,-0.022598267,0.0002977848,-0.03375244,-0.0050239563,-0.06561279,0.047058105,0.07733154,-0.018249512,-0.0039787292,0.020431519,0.006904602,-0.029083252,0.0046157837,-0.014457703,-0.020599365,-0.016281128,0.013664246,-0.03543091,0.018295288,0.022232056,0.030410767,0.055114746,-0.02279663,-0.043884277,-0.004623413,-0.000849247,-0.025436401,-0.03149414,-0.0014371872,0.009101868,0.018600464,0.049743652,0.0026779175,0.029022217,-0.010101318,0.014709473,0.005970001,0.008056641,-0.007904053,-0.026290894,0.014564514,0.0051116943,-0.06161499,0.014228821,-0.010650635,0.048065186,-0.05795288,0.034484863,-0.007408142,0.021972656,0.042114258,0.00077056885,-0.044891357,0.009307861,0.029083252,0.00014090538,0.030670166,0.0059280396,-0.018875122,-0.003227234,0.07775879,-0.033172607,-0.014778137,0.009346008,0.03262329,0.033172607,-0.00995636,-0.055023193,-0.033172607,-0.010070801,-0.03302002,0.030441284,-0.0048828125,0.026138306,-0.011932373,0.019546509,-0.038757324,-0.0002989769,-0.040039062,0.017959595,-0.0008597374,0.011489868,-0.011756897,-0.010345459,-0.008018494,0.03250122,-0.032043457,0.010574341,0.049468994,0.02368164,-0.0017032623,-0.03250122,-0.024383545,-0.004825592,0.0029335022,0.019577026,0.0362854,0.00674057,0.054138184,-0.023498535,0.0005187988,0.011512756,0.014183044,0.045166016,-0.001247406,-0.0004892349,-0.06951904,-0.044433594,-0.016433716,-0.041931152,0.026672363,0.029129028,-0.01612854,0.042816162,0.010238647,-0.026992798,-0.03225708,0.007648468,-0.033172607,0.007255554,0.047454834,-0.014785767,-0.03704834,0.016067505,0.000060617924,0.008705139,0.037750244,0.025466919,0.022750854,0.06793213,0.02861023,0.020874023,0.019943237,0.025543213,0.030838013,0.010673523,-0.015731812,-0.027191162,0.005355835,0.02508545,-0.036254883,-0.016967773,-0.052093506,0.06890869,0.03152466,0.0814209,0.018966675,0.009460449,0.06500244,-0.020568848,0.012359619,-0.025894165,-0.01991272,-0.03173828,-0.032562256,0.02545166,-0.011489868,0.015792847,-0.022247314,0.0368042,-0.004173279,0.012397766,-0.03439331,0.04626465,-0.008003235,-0.022842407,0.028640747,-0.0021190643,0.039154053,0.04824829,-0.048431396,0.012084961,0.009460449,-0.037384033,0.0073280334,0.041290283,-0.027008057,-0.0287323,-0.05419922,-0.040985107,-0.0039787292,0.003396988,-0.036468506,-0.008888245,0.013504028,0.028366089,0.03262329,-0.003282547,0.0131073,0.009666443,-0.010696411,-0.058746338,0.010070801,-0.04309082,-0.015853882,0.050842285,-0.013999939,-0.01914978,0.0028076172,-0.016799927,-0.0052719116,0.020401001,0.034820557,-0.012496948,-0.052215576,0.034057617,0.0052986145,0.014030457,0.0069236755,0.04168701,0.047180176,0.02897644,0.036376953,0.024719238,-0.016296387,-0.0736084,0.026168823,-0.033721924,-0.0010576248,0.023025513,-0.019180298,-0.0008826256,-0.015167236,-0.02619934,-0.038330078,0.01474762,-0.018157959,-0.0043563843,0.0209198,-0.0231781,-0.02545166,-0.059631348,-0.033966064,-0.0079422,0.06088257,0.04260254,0.00340271,-0.040100098,-0.01586914,0.006450653,0.007446289,0.030227661,-0.014656067,-0.010299683,-0.008430481,-0.030731201,-0.0001500845,-0.019683838,0.029525757,0.010826111,-0.0006632805,0.016220093,0.0075302124,0.014694214,0.0053901672,0.0074653625,0.025939941,-0.030181885,0.006336212,0.00818634,0.030303955,0.017318726,-0.00050115585,-0.030227661,0.064331055,0.0011005402,0.04156494,-0.038909912,-0.011810303,-0.0039863586,0.013252258,0.003993988,-0.020263672,-0.015457153,-0.014030457,-0.053771973,-0.0690918,0.043701172,-0.009468079,0.017669678,0.011360168,0.0034618378,0.021453857,-0.004623413,-0.0015268326,0.006702423,-0.03062439,-0.0211792,-0.021331787,-0.03375244,-0.021148682,-0.015007019,-0.018569946,0.021362305,-0.018493652,0.015914917,-0.0068626404,-0.02645874,0.031463623,0.006263733,0.0023880005,0.024398804,-0.008979797,0.027816772,0.046813965,0.011627197,-0.03353882,0.027359009,-0.005744934,0.0030136108,-0.0027675629,0.03994751,0.029785156,-0.010620117,0.0008955002,-0.00217247,-0.013847351,-0.024856567,0.005443573,-0.0014791489,-0.0054626465,-0.0044441223,-0.048980713,0.018341064,0.010437012,-0.025802612,-0.033477783,0.010604858,0.015670776,-0.043792725,0.02218628,0.028579712,0.061676025,-0.015716553,0.00390625,0.001045227,0.050323486,0.03012085,0.01235199,-0.017333984,0.018218994,-0.0016937256,0.00957489,0.00011909008,-0.016433716,0.018035889,0.006290436,0.017532349,0.022583008,0.010261536,-0.02897644,-0.037384033,0.00049209595,-0.016159058,-0.026245117,0.03111267,0.013961792,0.019699097,-0.017562866,0.025344849,0.0033664703,-0.0074386597,-0.027511597,-0.003709793,0.03857422,-0.00856781,-0.020263672,0.0064582825,0.007484436,0.029373169,-0.060577393,-0.018600464,0.014839172,-0.00035619736,-0.02758789,-0.029525757,-0.038726807,0.003604889,0.03555298,0.013587952,0.031951904,0.028793335,0.010871887,0.0014076233,0.029205322,-0.0016756058,-0.00061798096,-0.010246277,-0.043792725,-0.020736694,0.0012216568,-0.0038928986,-0.046813965,0.012687683,-0.022781372,-0.027114868,0.011123657,-0.02204895,-0.009208679,-0.008758545,0.0090789795,0.037261963,-0.005077362,0.018112183,-0.021972656,-0.033935547,-0.0073661804,0.01259613,0.022888184,-0.05340576,0.016799927,-0.016815186,-0.006652832,-0.0008711815,0.020721436,0.018051147,0.023956299,0.0037269592,0.046142578,-0.039123535,0.042419434,-0.028060913,0.024169922,-0.0072364807,-0.04324341,-0.0018024445,-0.024154663,-0.017089844,0.049743652,-0.024353027,-0.0003232956,-0.030929565,-0.02722168,-0.025543213,-0.04486084,0.00025343895,0.026733398,0.034698486,-0.017944336,0.0019102097,-0.0023555756,0.010917664,-0.02619934,0.0056495667,-0.011543274,0.0064964294,0.022491455,0.003850937,-0.030563354,-0.030075073,-0.007926941,0.008110046,-0.037017822,-0.040161133,-0.018798828,-0.00919342,-0.010757446,-0.0052871704,-0.018463135,-0.0423584,-0.0050811768,-0.03781128,0.016815186,-0.0021076202,0.019058228,0.019577026,-0.013023376,0.008071899,0.015007019,-0.01953125,0.038513184,0.0045318604,-0.0038890839,-0.047576904,0.011489868,0.024795532,0.013549805,-0.013725281,-0.01826477,-0.011352539,-0.027877808,-0.052978516,-0.0048446655,0.007446289,-0.012138367,0.0008172989,0.0070343018,-0.044677734,-0.014305115,-0.033294678,0.0014104843,0.03439331,0.019744873,0.0028152466,0.0077400208,0.012550354,-0.00020945072,-0.0118637085,-0.04248047,0.014083862,0.01071167,0.0036830902,0.047058105,0.04949951,0.0020484924,-0.01689148,-0.00027489662,0.014892578,0.011154175,-0.009552002,0.013626099,-0.028182983,0.017868042,-0.0011138916,-0.018447876,-0.039367676,-0.009407043,0.07672119,-0.0027637482,-0.0053100586,0.0070228577,0.0071792603,0.01612854,0.033721924,-0.027877808,-0.0031929016,-0.026489258,0.02029419,-0.013641357,0.013465881,0.0008096695,0.009269714,-0.014724731,-0.050598145,-0.018066406,-0.002500534,-0.017227173,-0.060821533,-0.022109985,-0.07659912,0.009651184,-0.010726929,-0.03479004,-0.00058317184,0.022247314,-0.019683838,-0.07647705,0.007843018,0.06161499,0.00023245811,0.018295288,-0.013076782,0.022537231,0.024719238,-0.04055786,-0.018508911,0.01675415,-0.030654907,-0.016571045,-0.01474762,0.011909485,-0.0060424805,-0.0030460358,0.014930725,0.020523071,0.013145447,-0.013343811,0.015403748,-0.010902405,0.016433716,-0.0046920776,0.020629883,-0.009231567,-0.009399414,0.029006958,-0.054351807,0.009277344,0.018478394,-0.007347107,0.022125244,0.034301758,0.049468994,-0.048828125,-0.016677856,0.030914307,0.023361206,0.03753662,-0.021713257,0.03930664,0.00021028519,-0.015464783,0.0126571655,-0.00806427,-0.017684937,-0.036132812,-0.026229858,0.026138306,-0.01084137,-0.0029506683,-0.018005371,0.020599365,0.014785767,0.0042686462,0.0062675476,-0.021240234,-0.028579712,-0.016418457,0.0060424805,0.0059280396,0.0067977905,-0.002023697,0.027328491,0.029022217,0.030258179,0.010040283,-0.0008635521,0.011314392,0.029571533,-0.011558533,-0.0011796951,0.036071777,0.0071983337,0.018341064,0.022979736,0.0006227493,-0.056488037,-0.011741638,-0.026321411,-0.023529053,-0.014457703,-0.020889282,-0.010559082,-0.0060424805,0.0007009506,-0.012809753,-0.016311646,0.008277893,-0.041503906,-0.028167725,-0.008346558,-0.00333786,0.026657104,0.004421234,0.008369446,0.010360718,-0.006427765,0.04660034,0.014694214,-0.00642395,0.040100098,0.04046631,0.013442993,-0.018737793,0.0014066696,0.0010652542,-0.00982666,0.008934021,-0.027740479,0.018051147,0.04083252,-0.006931305,0.0020828247,0.0015630722,0.025894165,-0.011146545,0.005420685,0.008605957,0.020431519,-0.024642944,0.04837036,-0.040924072,0.002746582,0.0057678223,0.009857178,-0.014503479,-0.009735107,-0.03552246,0.016235352,0.0014820099,-0.008590698,0.052734375,0.002155304,0.028060913,-0.02772522,-0.019241333,0.015655518,-0.01890564,-0.012863159,0.02407837,-0.0048446655,0.0013570786,0.008422852,-0.013771057,0.024719238,-0.029968262,0.013221741,0.0036678314,-0.0031337738,-0.010025024,-0.007637024,-0.024551392,-0.0074386597,-0.01020813,0.009223938,-0.011352539,0.05053711,0.024902344,0.03253174,0.05429077,0.02003479,0.015335083,-0.04660034,-0.038513184,-0.0019893646,-0.013092041,0.016662598,-0.013549805,0.0446167,0.035705566,0.030929565,0.03265381,0.03677368,0.037628174,0.0031490326,0.0116119385,-0.016952515,0.012359619,-0.008544922,0.022384644,-0.0075263977,0.03677368,-0.034942627,0.005092621,0.012359619,0.0146865845,-0.03036499,0.040527344,0.06185913,0.009857178,-0.014503479,0.037200928,-0.0014305115,-0.016967773,-0.010070801,-0.010726929,0.051635742,0.004421234,0.045776367,0.037384033,0.009086609,-0.0068969727,0.022827148,-0.04623413,-0.024673462,0.057800293,0.039031982,-0.027404785,-0.017868042,-0.0049934387,0.006298065,-0.03933716,-0.0211792,0.010360718,0.016220093,0.012397766,-0.00089502335,-0.008201599,-0.0154418945,0.0035800934,0.024337769,0.005970001,-0.014450073,0.026168823,0.021530151,-0.013832092,0.025024414,0.0031929016,0.04647827,-0.02420044,-0.010757446,0.010543823,0.030181885,-0.012428284,-0.0028457642,0.020706177,-0.004749298,0.042633057,0.03955078,-0.020751953,0.0017843246,0.019592285,0.016738892,-0.0020961761,0.048858643,0.038085938,0.019073486,0.03793335,0.038635254,0.02003479,-0.03491211,0.008216858,-0.004436493,-0.001206398,-0.0055389404,-0.011184692,0.007896423,-0.022155762,0.01928711,0.00080394745,-0.0110321045,0.02142334,0.024353027,-0.00007516146,-0.0013093948,-0.009605408,0.009254456,-0.030929565,-0.0061569214,0.014945984,-0.0060653687,0.02192688,0.013320923,0.029205322,-0.026275635,0.026290894,-0.0143966675,-0.021087646,-0.011398315,0.014915466,-0.038604736,-0.0028572083,0.011352539,0.0023059845,-0.041748047,0.009117126,0.033203125,-0.017868042,0.02394104,0.008575439,0.0041656494,-0.01210022,0.028579712,0.0039863586,-0.010131836,-0.014411926,-0.020462036,0.012466431,0.039764404,0.008872986,0.018417358,-0.028320312,0.0051956177,-0.0004441738,-0.005176544,-0.0045814514,-0.008407593,-0.013496399,-0.012611389,0.02229309,0.021057129,0.007007599,0.043945312,-0.008903503,-0.018005371,0.0032100677,0.046325684,0.0056419373,0.0049819946,-0.01033783,0.028060913,-0.027816772,0.044830322,0.038238525,0.003419876,0.02355957,-0.0124053955,-0.0107421875,0.019805908,-0.008285522,0.021652222,-0.013313293,0.01374054,-0.011619568,0.028793335,-0.0096588135,-0.030776978,0.0055007935,-0.0007133484,-0.019302368,-0.02407837,0.0234375,-0.005832672,0.025390625,0.035980225,0.014228821,-0.031341553,0.06311035,-0.026367188,0.03668213,-0.009391785,-0.010665894,0.046691895,0.015960693,0.031463623,0.02798462,0.0033340454,-0.032104492,0.016799927,0.04135132,0.030471802,0.014472961,0.0077590942,-0.026779175,0.037750244,0.005470276,0.038085938,-0.0059547424,0.00085639954,0.008308411,-0.0021438599,-0.0061683655,0.0048828125,-0.0027599335,0.0013313293,0.043182373,-0.021896362,-0.00573349,-0.015548706,-0.014724731,0.031982422,-0.00020480156,0.00040197372,-0.005039215,-0.030380249,0.009933472,-0.02394104,-0.026229858,0.007270813,0.029281616,-0.047973633,-0.023391724,0.010955811,0.022872925,-0.020141602,0.030593872,0.02017212,-0.0068893433,0.0061531067,0.027618408,-0.0050468445,0.024810791,-0.012954712,0.018585205,0.044128418,0.0013523102,-0.014122009,0.0008049011,0.0154953,-0.0059318542,0.0046691895,0.02960205,-0.019851685,0.008110046,-0.0044403076,0.0060920715,-0.009017944,-0.0024051666,-0.011764526,0.009895325,-0.015914917,-0.008163452,0.0035305023,0.0021419525,0.00440979,0.0070343018,-0.010383606,-0.0072288513,0.012306213,0.025314331,0.026687622,-0.038330078,0.005783081,0.003276825,0.008094788,-0.015586853,0.004524231,-0.002149582,-0.040252686,0.026824951,0.011146545,0.008514404,0.009971619,-0.030181885,0.011550903,0.030563354,0.011993408,0.009239197,0.0056037903,-0.014602661,0.012184143,-0.014724731,-0.01335907,-0.0006155968,-0.00617218,0.010665894,0.02079773,-0.008407593,-0.02331543,0.037719727,-0.0072746277,0.011993408,-0.0031204224,-0.020446777,0.027359009,-0.0016593933,0.00034952164,0.006362915,0.022338867,-0.0093688965,-0.012931824,-0.0049209595,0.02229309,0.0625,-0.019989014,-0.015129089,0.02078247,0.01651001,0.018157959,0.0395813,0.0056915283,0.040222168,0.021072388,-0.03781128,-0.018096924,0.017044067,-0.015464783,-0.022460938,0.018066406,-0.010681152,-0.014122009,0.016433716,0.0039367676,-0.005706787,-0.037750244,-0.011665344,-0.010948181,-0.0231781,0.012863159,-0.013442993,0.021072388,-0.011566162,-0.01235199,0.015609741,-0.023162842,-0.03982544,-0.016143799,0.0015029907,-0.014091492,-0.057891846,0.0041046143,-0.02381897,0.012466431,-0.020721436,-0.00020742416,-0.008720398,0.032470703,-0.022521973,-0.010513306,0.00059843063,0.023513794,0.023162842,0.005607605,0.02104187,-0.020828247,-0.02949524,-0.025924683,0.008979797,-0.013832092,0.020217896,0.0057868958,0.030853271,0.020233154,-0.0005631447,0.0048103333,-0.01083374,-0.003124237,-0.010391235,-0.017623901,-0.022262573,0.022628784,0.012481689,-0.0014762878,-0.0010194778,0.034851074,-0.015464783,-0.018157959,0.015716553,0.046325684,-0.0036811829,0.026916504,-0.010017395,-0.009170532,-0.01802063,0.007091522,-0.020248413,0.004386902,0.014381409,-0.0056266785,-0.0027809143,0.010299683,0.028289795,-0.012145996,0.002292633,0.026885986,0.013587952,0.0047073364,0.036895752,0.012626648,-0.0034809113,-0.027145386,-0.014213562,0.016723633,0.05053711,0.009735107,0.0096206665,-0.0045394897,0.0018568039,-0.012992859,0.018188477,0.015838623,-0.02154541,-0.044189453,-0.014823914,-0.032440186,0.019760132,-0.002357483,0.020690918,-0.0027580261,0.012954712,-0.020233154,-0.030929565,-0.018218994,0.033447266,0.021881104,-0.007080078,-0.013725281,0.006614685,0.016815186,-0.03894043,-0.0050468445,-0.032196045,-0.031982422,-0.019058228,-0.011444092,0.028656006,0.011726379,-0.00052022934,0.0026817322,0.008964539,-0.011260986,0.004989624,0.022857666,-0.016220093,-0.0034160614,0.028945923,0.015220642,-0.03253174,0.016326904,-0.0046653748,-0.0067749023,0.013168335,-0.010368347,0.014709473,-0.021881104,0.036621094,-0.01777649,-0.0029411316,0.03366089,-0.00033903122,0.004714966,-0.029968262,0.01966858,0.005168915,0.007484436,0.046051025,-0.023803711,-0.025650024,0.017501831,-0.016098022,-0.022537231,0.010612488,0.010955811,0.03353882,-0.008583069,0.035369873,-0.010635376,0.0014352798,0.014839172,0.01737976,-0.017959595,-0.0015792847,0.022583008,0.0013084412,0.004699707,0.007007599,-0.014823914,-0.03591919,-0.019729614,0.011123657,-0.0020198822,-0.022827148,0.028244019,0.014343262,0.054595947,-0.023422241,0.004837036,0.026855469,0.002248764,0.028182983,0.0067596436,0.044952393,0.0014533997,-0.02810669,0.0018358231,-0.0107421875,-0.027694702,0.0010824203,0.01096344,0.008522034,-0.035858154,0.008384705,-0.005619049,0.023864746,-0.018661499,0.0021762848,-0.021514893,-0.009239197,-0.03656006,-0.010307312,-0.029083252,0.014183044,0.04296875,0.029266357,0.02444458,0.0074920654,-0.016220093,0.018737793,0.051483154,-0.014472961,-0.03753662,-0.022598267,0.009277344,0.007709503,0.011039734,0.007499695,-0.00819397,-0.012954712,0.006767273,-0.006603241,0.0057640076,0.0031013489,0.0038928986,0.011314392,-0.008987427,-0.007472992,0.02319336,-0.0046463013,0.00018560886,0.0041275024,0.00340271,0.039916992,0.027282715,-0.014183044,0.02394104,0.013587952,-0.039642334,0.057891846,-0.004058838,0.027252197,-0.014877319,0.012687683,-0.038116455,-0.016204834,-0.004753113,0.0037403107],"createdAt":"2026-04-19T00:29:50.885Z","updatedAt":"2026-04-22T08:31:58.838Z","lastSeenAt":"2026-04-22T08:31:58.838Z","tsv":"'/api/v1/collections/26':62 '/call':12,30 '/request':151 '0.02':11,29,99,150 '000':89 '0x8335':77 '20':88 '2913':78 '6':94 'accept':69 'access':48,67,167 'across':107 'advertis':84,156 'ai':117 'ai-inference' 'analysi':121 'analyt':111 'api':5,16,23,34,46,66,158 'avail':212 'base':8,26,56,80,90,184 'base network api' 'base-network' 'beyond':189 'broader':103 'categori':109 'challeng':83 'classif':124 'classification' 'collect':6,24,40 'connect':199 'contract':76 'convers':141 'crawl':215 'data':110,114 'data-analytics' 'decim':95 'detail':203 'document':187 'embed':125 'embeddings' 'empti':195 'endpoint':47,60,106,144,209 'entir':171 'equal':98 'estim':135 'exchang':130 'export':115 'feed':129 'financ':126 'finance-data' 'four':108 'gas':134 'generat':142 'geocod':139 'geocoding' 'handl':170 'header':180 'host':38 'individu':208 'infrastructur':137 'insight':116 'instant':166 'key':17,35,159 'l2':185 'label':64 'land':191 'larg':194 'learn':119 'limit':162 'list':146 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':118 'materi':216 'maxamountrequir':86 'mechan':181 'metric':112 'micropayment api' 'minimum':164 'network':57,186 'no-api-key' 'offer':105 'page':188,192 'pay':2,20,43 'pay per request api' 'pay-per-request':1,19,42 'payment':52,73,168,179 'per':3,21,44,100 'per-request-billing' 'platform':104,155 'point':153 'post':70 'premium':65 'price':128,152 'prompt':201 'protocol':53,175 'quot':133 'rate':131,161 'report':113 'request':4,22,45,71,101 'request/response':205 'requir':18,36 'schema':206 'sentiment':120 'sentiment-analysis' 'settl':72 'show':196 'specif':59 'summar':123 'text':122 'text-summarization' 'token':132 'unit':91 'usdc':14,32,75,97 'usdc api' 'usdc-settlement' 'util':138 'valid':140 'via':9,27,49 'wallet':200 'web3':127 'x':178 'x-payment':177 'x402':10,28,51,82,174 'x402 api' 'x402-payment'","prices":[{"id":"cb5009ff-c6ea-4293-afac-2ab99e07cb0b","listingId":"c4e6698d-a21b-4350-ad7c-4aaec193d4ae","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/collections/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T00:29:50.885Z"}],"sources":[{"listingId":"c4e6698d-a21b-4350-ad7c-4aaec193d4ae","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:29:50.885Z","lastSeenAt":"2026-04-22T08:31:58.838Z"}],"details":{"listingId":"c4e6698d-a21b-4350-ad7c-4aaec193d4ae","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/26 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units in USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/26"},{"claim":"All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) with per-call USDC payments","Fetching real-time financial data like token quotes, exchange rates, and gas estimates without subscription commitments","Running data analytics queries and exporting reports on a pay-as-you-go basis","Using utility services like geocoding and validation without managing API keys"],"bestFor":["Agents or developers who want instant API access without signup or API key management","Low-volume or bursty workloads where per-request pricing is more economical than subscriptions","Crypto-native applications already operating on the Base network with USDC"],"notFor":["High-volume production workloads where $0.02/request adds up significantly compared to bulk-priced alternatives","Users who need detailed API documentation, request/response schemas, or SLA guarantees before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.915Z"},"updatedAt":"2026-04-22T08:31:58.838Z"}}