{"id":"e3f906d3-c83f-447e-95e7-b40106095f3a","shortId":"jh9ccb","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request 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 at `/api/v1/payments/94` is labeled \"Premium API Access\" and requires a POST request with an x402 payment header. The maximum amount required per call is 20,000 base units of USDC (0x8335…), which equals $0.02 given USDC's 6 decimals. No API keys, rate limits, or upfront commitments are needed — each request is paid individually via an on-chain micropayment.\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 listed endpoints are priced at $0.02 per request. However, the specific endpoint probed here (`/api/v1/payments/94`) does not clearly map to any of those named services — its description is simply \"Premium API Access\" with no further documentation on what data or functionality it returns.\n\nDocumentation 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 spec, no request/response schema documentation, and no examples of what the endpoint actually returns. The endpoint is confirmed live (returns a valid 402 challenge), but without knowing what it does beyond the generic label, agents should treat this as an opaque paid endpoint.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-platform","payments"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","low payment fee API","crypto API access"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","The endpoint path '/api/v1/payments/94' does not match any of the named API categories on the landing page; its actual functionality is unknown.","No request body schema or response schema is documented anywhere.","No OpenAPI or machine-readable spec is available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/94","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge, but there is zero documentation on what the endpoint actually does or returns. No OpenAPI spec, no request/response examples, and the docs pages are empty. The 'Premium API Access' label is completely generic.","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":"2026-04-19T07:19:33.727Z","embedding":[-0.023788452,-0.024887085,0.031585693,0.018112183,0.008361816,-0.030883789,-0.025375366,0.028762817,0.078063965,-0.062438965,0.02281189,-0.0463562,-0.033569336,-0.028076172,-0.031021118,0.0041275024,-0.0039711,-0.001206398,-0.03616333,0.022888184,0.03186035,-0.009155273,-0.038238525,0.036590576,0.0027065277,-0.019622803,-0.010391235,-0.009002686,-0.013763428,-0.04321289,0.04598999,-0.031829834,-0.0039863586,0.008224487,-0.011665344,-0.022781372,0.0034370422,0.028808594,0.028182983,-0.008483887,-0.0062789917,-0.057739258,0.0039405823,-0.013999939,-0.058563232,0.0010576248,0.0037593842,-0.018829346,0.0034866333,-0.004764557,-0.038085938,-0.0079574585,-0.012573242,0.013587952,0.0073661804,0.0121154785,-0.0032367706,-0.01864624,0.00484848,0.014694214,-0.017837524,-0.055358887,-0.016113281,-0.014953613,0.0034828186,0.047790527,-0.008369446,0.037628174,0.009719849,0.06112671,0.04257202,0.05154419,0.017120361,0.013870239,-0.010040283,-0.0056266785,0.005428314,0.061920166,-0.011444092,-0.023620605,-0.015838623,-0.0019102097,-0.05291748,-0.0036239624,-0.025405884,-0.039398193,-0.02508545,0.015556335,-0.013549805,0.02670288,-0.07800293,0.0035648346,-0.009239197,0.001282692,0.0029945374,-0.008598328,-0.013748169,0.033111572,-0.0058250427,0.012992859,-0.0062789917,-0.04196167,0.011482239,0.002943039,0.039978027,0.05505371,0.021774292,0.021072388,0.012176514,-0.006668091,-0.02456665,0.020477295,-0.009765625,-0.006259918,0.005958557,0.009963989,-0.013908386,0.01411438,-0.030883789,0.019073486,-0.05117798,0.048461914,0.011383057,0.0014152527,0.0027637482,-0.044067383,-0.005760193,0.021011353,-0.026626587,-0.000620842,0.021316528,0.008392334,0.033233643,-0.021148682,-0.037902832,0.019302368,-0.026016235,-0.014953613,-0.04611206,-0.03111267,0.041900635,-0.021621704,0.02166748,0.03692627,-0.093811035,-0.00844574,-0.048675537,0.011543274,-0.034362793,-0.0067253113,0.0056991577,0.02633667,-0.014549255,-0.019729614,-0.03253174,-0.029129028,0.004676819,0.04071045,-0.015129089,0.041015625,-0.020355225,0.024002075,0.015991211,0.00919342,0.01991272,0.021011353,-0.003900528,-0.07946777,-0.08691406,-0.020721436,-0.0069389343,-0.018585205,-0.031463623,0.010871887,-0.008796692,-0.06854248,-0.009498596,-0.022964478,-0.0030612946,-0.043121338,-0.004966736,-0.0262146,0.017532349,-0.002588272,-0.07513428,-0.028045654,-0.024673462,0.055145264,0.02720642,0.020614624,0.028366089,-0.019073486,0.062286377,0.0155181885,-0.023727417,-0.019256592,0.020599365,-0.024902344,0.022994995,-0.008781433,0.008476257,-0.03366089,0.036376953,0.06915283,0.017181396,-0.024169922,-0.018722534,-0.06402588,-0.04144287,-0.03564453,0.01687622,0.0023441315,-0.0087509155,0.03640747,-0.028869629,-0.034973145,0.007411957,0.015083313,0.019699097,0.06506348,0.016845703,-0.005340576,0.024536133,0.023788452,-0.05709839,0.0368042,0.03817749,0.018005371,-0.027282715,-0.026870728,0.027023315,0.045928955,-0.030731201,0.017166138,-0.012390137,0.024368286,-0.009140015,0.004711151,0.018707275,-0.014945984,-0.015853882,-0.023910522,-0.027282715,0.026824951,0.0075569153,-0.029968262,-0.03062439,-0.078552246,0.049102783,0.026779175,0.052215576,-0.0013418198,0.005622864,-0.017074585,-0.019226074,-0.06829834,0.057769775,0.078430176,-0.011627197,-0.012794495,0.020446777,-0.0110321045,-0.038909912,0.0052986145,-0.014801025,-0.035827637,-0.02810669,0.018112183,-0.032348633,-0.0039024353,0.0154800415,0.031402588,0.05218506,-0.0006322861,-0.050201416,-0.02368164,-0.006259918,-0.00092983246,-0.029830933,0.0079956055,-0.011581421,0.006000519,0.015853882,0.010360718,0.015571594,-0.00166893,-0.004058838,-0.006629944,0.0026988983,-0.010047913,-0.027557373,0.014930725,-0.0010633469,-0.06335449,0.004589081,-0.00002759695,0.081848145,-0.045837402,0.03451538,-0.015129089,0.012702942,0.053375244,-0.007167816,-0.049102783,0.004180908,0.02796936,0.016708374,0.05105591,0.0044136047,-0.0340271,-0.022094727,0.07098389,-0.0118255615,-0.0026245117,0.0107803345,0.01663208,0.03845215,-0.005531311,-0.05810547,-0.033966064,-0.004261017,-0.042022705,0.018737793,-0.03012085,0.029541016,-0.01939392,0.0012044907,-0.019119263,-0.0046424866,-0.033447266,0.008590698,-0.015281677,0.00970459,-0.025283813,-0.016418457,0.018447876,0.01322937,-0.010635376,0.020645142,0.039520264,0.02720642,-0.006515503,-0.026138306,-0.020141602,-0.009857178,-0.0021648407,0.020645142,0.015075684,0.025878906,0.056152344,-0.038848877,0.007144928,0.029891968,0.020889282,0.033966064,-0.0019102097,0.0023040771,-0.062347412,-0.055877686,-0.030014038,-0.04324341,0.023513794,0.0035686493,-0.017440796,0.054351807,0.01537323,-0.020141602,-0.04864502,0.01864624,-0.047058105,-0.0057373047,0.045013428,-0.013748169,-0.02558899,0.0031661987,-0.004432678,0.0044288635,0.03857422,0.016708374,0.02658081,0.069885254,0.04650879,0.011108398,0.023803711,-0.0037136078,0.02659607,-0.0012178421,-0.03062439,-0.03161621,-0.014205933,0.034698486,-0.020080566,-0.019104004,-0.06341553,0.053222656,0.038391113,0.08148193,0.018478394,0.008300781,0.032836914,-0.015602112,0.011581421,-0.02558899,-0.012504578,-0.028869629,-0.058929443,0.03994751,-0.012649536,-0.009788513,-0.013458252,0.041931152,-0.009750366,0.023162842,-0.021240234,0.04611206,-0.009750366,-0.000093340874,0.0151901245,0.016540527,0.053344727,0.066833496,-0.04437256,0.022476196,0.024749756,-0.028778076,0.005382538,0.03652954,-0.017547607,-0.010429382,-0.053375244,-0.02482605,-0.008575439,-0.009895325,-0.05227661,0.002149582,0.008102417,0.017166138,0.014274597,-0.006351471,-0.016799927,0.0028133392,-0.022781372,-0.05331421,-0.0073661804,-0.03250122,0.0059280396,0.04144287,-0.025650024,-0.007381439,0.003156662,-0.009933472,0.0017957687,0.023803711,0.022338867,0.00044965744,-0.05368042,0.029525757,0.01084137,-0.0011978149,0.008354187,0.035491943,0.02041626,0.031433105,0.053985596,0.0178833,-0.0211792,-0.064453125,0.019561768,-0.049682617,0.007472992,0.027938843,-0.025375366,0.002708435,-0.020446777,-0.025970459,-0.033599854,0.009971619,-0.04043579,0.0034599304,0.022415161,-0.010643005,-0.0317688,-0.052978516,-0.02961731,0.008178711,0.05734253,0.01626587,0.0082473755,-0.059295654,-0.00015974045,0.018356323,0.0063171387,0.030044556,-0.014533997,-0.011619568,-0.015426636,-0.03857422,-0.0066108704,-0.027130127,0.020568848,-0.006801605,-0.012054443,0.02557373,0.009643555,0.020751953,0.009849548,0.0132369995,0.02217102,-0.025863647,-0.005542755,-0.012062073,0.044311523,0.0041885376,-0.011550903,-0.05316162,0.039031982,0.015533447,0.037963867,-0.04550171,-0.0028896332,-0.007850647,0.0074005127,0.016464233,-0.0031108856,-0.010169983,-0.010391235,-0.048797607,-0.05529785,0.045410156,-0.016357422,0.025848389,0.02116394,0.013305664,0.021942139,-0.007194519,-0.005306244,0.009353638,-0.026870728,-0.004425049,-0.01737976,-0.029464722,-0.019302368,-0.016113281,-0.028076172,0.024734497,-0.024307251,0.020355225,0.011756897,-0.017715454,0.01979065,-0.002368927,0.0006093979,0.015686035,0.00029230118,0.018753052,0.041381836,0.016860962,-0.039001465,0.02633667,0.0041656494,0.009597778,-0.0023822784,0.03955078,0.029907227,-0.0058403015,-0.011558533,-0.014678955,-0.02104187,-0.021011353,0.003993988,0.007827759,0.011985779,-0.0033283234,-0.051086426,0.018173218,0.0103302,-0.0340271,-0.02619934,0.020721436,0.01411438,-0.03479004,0.020263672,0.033935547,0.057250977,-0.026901245,0.0016841888,0.001364708,0.025283813,0.034088135,0.011962891,-0.0057868958,0.015945435,-0.013008118,0.0110321045,-0.0040283203,-0.018218994,0.020050049,0.013961792,0.026733398,0.02229309,0.008590698,-0.02406311,-0.03274536,0.004611969,-0.018432617,-0.022018433,0.020996094,0.024291992,0.033996582,-0.029571533,0.019104004,0.021652222,-0.017196655,-0.016708374,-0.012374878,0.038482666,-0.02017212,-0.016799927,0.021270752,0.021759033,0.0284729,-0.058654785,0.0016870499,0.00018060207,0.015655518,-0.027282715,-0.041778564,-0.04058838,0.008277893,0.03729248,0.015792847,0.024139404,0.03677368,0.0034236908,0.008224487,0.023849487,-0.0016145706,-0.00982666,-0.021377563,-0.043640137,-0.020141602,-0.015792847,0.0017280579,-0.029251099,0.008865356,-0.0021457672,-0.029418945,0.004108429,-0.013687134,-0.0019836426,-0.010269165,0.0051574707,0.03213501,0.009307861,0.017929077,-0.01651001,-0.031707764,-0.0023841858,0.008026123,0.021224976,-0.046875,0.016052246,-0.014259338,-0.0071907043,0.005821228,0.009788513,0.01902771,0.027557373,0.01084137,0.028518677,-0.04107666,0.049835205,-0.036712646,0.009986877,0.007385254,-0.03656006,-0.013710022,-0.023422241,-0.018005371,0.036834717,-0.030441284,-0.0099105835,-0.02671814,-0.043121338,-0.018859863,-0.0569458,0.016494751,0.040893555,0.037750244,-0.02760315,-0.0025348663,-0.0011749268,0.0051574707,-0.018173218,0.006828308,-0.014312744,0.021026611,0.024795532,0.0061683655,-0.036102295,-0.023620605,-0.020706177,0.0082092285,-0.039978027,-0.044891357,-0.007381439,0.000109255314,-0.0072021484,-0.01449585,-0.024459839,-0.03466797,0.0019254684,-0.04269409,0.0073928833,0.00283432,0.0135269165,0.0012111664,-0.025222778,-0.007217407,0.017669678,-0.015007019,0.035125732,0.0055999756,-0.009788513,-0.040374756,0.0082092285,0.01789856,0.017700195,0.0005760193,-0.017318726,-0.008399963,-0.012901306,-0.053222656,-0.008934021,-0.009643555,-0.0066375732,-0.013618469,0.0026054382,-0.047546387,-0.00020384789,-0.018478394,0.0053367615,0.019363403,0.0069274902,0.009147644,-0.0039634705,0.015365601,-0.0076942444,-0.018432617,-0.02658081,0.016296387,0.010971069,0.009094238,0.026824951,0.04559326,0.006866455,-0.020050049,0.012710571,-0.006713867,0.013946533,-0.016983032,0.014640808,-0.022735596,0.0073280334,-0.007801056,-0.012962341,-0.03527832,-0.00060129166,0.09185791,-0.006374359,-0.0076026917,-0.009292603,-0.02305603,0.024459839,0.031799316,-0.044433594,-0.00881958,-0.03338623,0.018615723,-0.022994995,0.011474609,0.0002373457,0.022491455,-0.013916016,-0.056152344,-0.018310547,-0.0075416565,-0.012184143,-0.06518555,-0.02734375,-0.07269287,-0.0010223389,-0.007286072,-0.020874023,-0.001914978,0.011672974,-0.01373291,-0.08642578,-0.004562378,0.04525757,0.016342163,0.025115967,-0.0053215027,0.026245117,0.019241333,-0.0340271,-0.0013923645,0.03274536,-0.023269653,-0.017868042,-0.028625488,0.014564514,-0.015220642,-0.019012451,0.016662598,0.009185791,0.018295288,-0.0121536255,0.009376526,-0.011619568,0.023757935,-0.02053833,0.01689148,-0.011695862,-0.015792847,0.039733887,-0.053527832,0.025390625,0.011505127,-0.005748749,0.008140564,0.030014038,0.0368042,-0.032104492,-0.018066406,0.0184021,0.01449585,0.03994751,-0.02053833,0.040283203,0.009429932,-0.018295288,0.013748169,-0.00022673607,-0.01737976,-0.033447266,-0.023635864,0.016845703,-0.0013666153,0.01727295,-0.019485474,-0.0026378632,0.010627747,-0.0026378632,0.016677856,-0.015258789,-0.020462036,-0.017333984,-0.0033512115,0.0061569214,0.0055770874,-0.0050964355,0.029205322,0.025680542,0.03353882,0.012916565,-0.013748169,0.0071907043,0.026901245,-0.010734558,0.004840851,0.020935059,0.0028476715,0.017105103,0.020187378,0.011528015,-0.044921875,-0.014389038,-0.026947021,-0.016021729,-0.002752304,-0.0074310303,-0.011672974,-0.0070533752,0.009567261,-0.009262085,-0.028259277,0.0055885315,-0.022720337,-0.024139404,-0.007896423,-0.021087646,0.021865845,0.004299164,0.007972717,0.0071754456,-0.0013608932,0.04486084,-0.0045776367,-0.016036987,0.026138306,0.032440186,0.014572144,-0.030258179,-0.010658264,-0.00944519,-0.0020065308,0.0011978149,-0.03527832,0.008132935,0.04598999,-0.020217896,0.0017051697,0.012718201,0.026412964,-0.008659363,0.010498047,-0.010772705,0.018356323,-0.010093689,0.031311035,-0.045898438,0.019226074,0.012626648,0.0022087097,-0.005958557,-0.009231567,-0.02520752,0.013641357,0.0069847107,-0.012290955,0.049682617,0.008956909,0.024307251,-0.021774292,-0.022521973,0.006893158,-0.024642944,-0.017700195,0.029464722,-0.0042877197,-0.0013494492,0.012924194,-0.02909851,0.03933716,-0.036254883,0.022506714,0.0009794235,-0.00080919266,0.001159668,-0.02708435,-0.007965088,-0.015113831,-0.018325806,0.0035190582,-0.0029201508,0.044921875,0.021911621,0.035827637,0.048034668,0.014892578,-0.00459671,-0.036346436,-0.033966064,0.006629944,-0.017608643,0.016815186,-0.014221191,0.05935669,0.040374756,0.0005598068,0.040649414,0.03652954,0.032958984,0.0046653748,0.0016365051,-0.017089844,0.0115737915,-0.00045633316,0.023330688,-0.004371643,0.036376953,-0.03540039,0.03062439,0.010322571,0.030044556,-0.025253296,0.032318115,0.0770874,0.01727295,-0.012359619,0.040893555,-0.012138367,-0.009796143,-0.012367249,-0.015182495,0.054351807,0.006023407,0.05215454,0.04888916,0.013694763,-0.00049591064,0.01802063,-0.026855469,-0.017913818,0.06427002,0.019622803,-0.024246216,-0.0132751465,-0.0027885437,0.010757446,-0.046203613,-0.030700684,0.021972656,-0.012992859,0.0057373047,-0.0069122314,-0.00084877014,-0.013061523,0.009269714,0.027679443,0.009262085,-0.0129470825,0.023849487,0.03845215,-0.0028591156,0.029205322,-0.0050621033,0.02268982,-0.025299072,-0.028671265,0.019042969,0.020721436,-0.005592346,-0.016403198,0.025238037,0.008239746,0.038208008,0.045013428,-0.018447876,0.006084442,0.032470703,0.012397766,-0.004436493,0.05505371,0.037231445,0.017089844,0.03756714,0.031341553,0.03491211,-0.041503906,0.024597168,-0.0015287399,0.006412506,-0.0107421875,-0.012001038,0.003660202,-0.013839722,0.012550354,-0.004142761,-0.011909485,0.02545166,0.026351929,-0.011581421,-0.0054893494,-0.00919342,0.0093307495,-0.021957397,-0.008911133,0.009315491,-0.015426636,0.042175293,0.014694214,0.021835327,-0.026397705,0.027420044,-0.00047302246,-0.018707275,0.0013389587,0.0206604,-0.033721924,0.010025024,-0.0038642883,0.0042419434,-0.056610107,0.0104522705,0.024261475,-0.012649536,0.02923584,0.009796143,-0.0027008057,0.0023212433,0.023544312,0.010261536,0.0010519028,-0.003610611,-0.025894165,0.038635254,0.04446411,-0.0014486313,0.0010595322,-0.026412964,-0.0059547424,0.0057258606,-0.007129669,-0.0017938614,-0.0019054413,-0.021530151,-0.028366089,0.016708374,0.03378296,0.02381897,0.05380249,-0.023986816,-0.013694763,0.008773804,0.036376953,0.005458832,-0.0025463104,0.0023212433,0.0119018555,-0.020019531,0.053497314,0.021240234,0.009437561,0.03074646,-0.0082092285,-0.016983032,0.0076942444,-0.00699234,0.026382446,-0.011268616,0.0068206787,-0.006046295,0.021743774,-0.017318726,-0.04562378,0.012702942,-0.014717102,-0.020874023,-0.0152282715,0.014762878,0.0014667511,0.029464722,0.035827637,0.02305603,-0.024658203,0.061645508,-0.009338379,0.0501709,-0.0011844635,-0.009819031,0.05154419,0.022872925,0.04147339,0.0152282715,0.016830444,-0.03491211,0.026260376,0.039245605,0.023254395,0.014472961,0.0019626617,-0.012901306,0.04244995,0.00009596348,0.032409668,-0.009765625,-0.0051002502,0.016662598,-0.0007596016,-0.012512207,-0.006954193,-0.0051002502,0.011222839,0.048736572,-0.031280518,-0.011184692,-0.032104492,-0.009979248,0.025054932,-0.020904541,0.006046295,0.006542206,-0.02709961,0.014945984,-0.026107788,-0.024139404,-0.002199173,0.025604248,-0.048919678,-0.011482239,0.001244545,0.016571045,-0.026107788,0.0390625,0.022415161,-0.0039863586,0.007926941,0.048736572,-0.0058517456,0.029830933,-0.012611389,0.0256958,0.034942627,0.0069084167,-0.019973755,-0.004714966,0.010322571,-0.014335632,0.012741089,0.037231445,-0.01071167,0.0077590942,-0.0028915405,-0.013259888,0.006801605,0.0062561035,-0.0038661957,0.0069847107,-0.01259613,-0.015823364,-0.0027046204,0.00793457,-0.004146576,0.005908966,-0.006046295,-0.016036987,0.009025574,0.039245605,0.016174316,-0.037963867,-0.0048675537,0.010177612,0.010276794,-0.03186035,-0.0155181885,-0.0046424866,-0.033050537,0.015602112,0.013298035,0.018447876,0.015945435,-0.022583008,0.0029144287,0.021759033,0.02017212,0.018203735,-0.0009379387,-0.00447464,0.013961792,-0.014022827,-0.00008225441,-0.0050086975,-0.011436462,0.0103302,0.02078247,0.0005750656,-0.028045654,0.024093628,0.0010681152,0.016418457,-0.0020561218,-0.018051147,0.014022827,-0.00944519,-0.006298065,0.0019760132,0.015319824,-0.012481689,-0.014625549,-0.012001038,0.03616333,0.05493164,-0.010826111,-0.010749817,0.025039673,0.016281128,0.016555786,0.033355713,-0.002462387,0.035705566,0.026351929,-0.013969421,-0.02458191,0.02305603,-0.015464783,-0.023620605,0.019546509,-0.017745972,-0.01701355,0.014762878,0.012969971,-0.00031995773,-0.031402588,-0.009361267,-0.0110321045,-0.018310547,0.018966675,-0.01222229,0.013641357,-0.027130127,-0.011650085,0.00818634,-0.029388428,-0.053955078,-0.01940918,-0.01184845,-0.012702942,-0.05493164,0.0052452087,-0.026550293,0.011833191,-0.031829834,-0.007911682,-0.012519836,0.017562866,-0.014076233,-0.0014238358,0.008300781,0.020874023,0.027160645,0.0054512024,0.024246216,-0.032409668,-0.032440186,-0.023910522,0.004562378,-0.014076233,0.01852417,0.005622864,0.037719727,0.02267456,-0.012458801,-0.0019006729,-0.006919861,0.0010328293,-0.01612854,-0.024627686,-0.030441284,0.026672363,0.015930176,-0.016052246,-0.013069153,0.043701172,-0.027053833,-0.018707275,0.030776978,0.03778076,0.010391235,0.023345947,-0.014335632,-0.0063323975,-0.010444641,0.004020691,-0.016220093,0.0104522705,0.0031356812,0.0056266785,-0.006816864,0.0039405823,0.028839111,-0.006248474,-0.009391785,0.026657104,0.0052757263,-0.010696411,0.033172607,0.015319824,0.008598328,-0.00983429,-0.008491516,0.016403198,0.04510498,0.009307861,0.006717682,-0.0010690689,0.010803223,-0.015258789,0.007457733,0.011688232,-0.021316528,-0.04055786,-0.016799927,-0.02456665,0.020019531,-0.005153656,0.016113281,-0.011367798,0.019943237,-0.016540527,-0.0284729,-0.023712158,0.03125,0.00957489,-0.014892578,-0.011154175,0.007686615,0.008239746,-0.033843994,-0.0017204285,-0.044525146,-0.043701172,-0.0056037903,-0.02822876,0.027160645,0.014968872,-0.011909485,0.0020523071,-0.0067253113,0.004299164,0.0013484955,0.024002075,-0.009429932,-0.005077362,0.03640747,0.010360718,-0.018569946,0.018966675,-0.008338928,-0.0025081635,0.019699097,-0.007320404,0.012580872,-0.022781372,0.032592773,-0.009727478,-0.0073013306,0.02670288,-0.0031089783,0.011581421,-0.040008545,0.0032482147,0.0012254715,-0.010246277,0.03375244,-0.034301758,-0.020401001,0.004688263,-0.020309448,-0.028182983,0.0035362244,0.015640259,0.033935547,-0.012237549,0.040863037,-0.020629883,-0.008262634,0.017471313,0.008728027,-0.013946533,0.0032920837,0.030014038,0.00091171265,-0.006668091,-0.0016746521,-0.018875122,-0.028656006,-0.002916336,0.016738892,-0.0033740997,-0.0129852295,0.027374268,0.009094238,0.04611206,-0.00032901764,0.019805908,0.0062294006,0.007511139,0.024093628,0.0029182434,0.06262207,0.0032043457,-0.026443481,0.0017204285,0.003692627,-0.027282715,0.0015974045,-0.015853882,0.0004131794,-0.039031982,0.011856079,-0.009147644,0.022140503,-0.018035889,0.014060974,-0.024795532,-0.01007843,-0.04196167,-0.009613037,-0.028442383,0.006965637,0.03012085,0.00027751923,0.022033691,0.0020046234,-0.024887085,0.020462036,0.051361084,-0.010681152,-0.02734375,-0.01689148,0.0038795471,-0.005432129,0.009712219,-0.0021572113,-0.019836426,-0.017669678,-0.0014858246,-0.019226074,0.008430481,-0.0060424805,0.022537231,0.007183075,-0.006641388,-0.0076828003,0.032318115,-0.006374359,-0.0028762817,0.013008118,0.0047950745,0.03616333,0.033966064,-0.011810303,0.019622803,0.018661499,-0.044128418,0.055877686,0.0028476715,0.026641846,-0.019134521,0.0030536652,-0.034820557,-0.0256958,-0.020751953,0.0015192032],"createdAt":"2026-04-18T18:50:57.500Z","updatedAt":"2026-04-23T19:01:22.903Z","lastSeenAt":"2026-04-23T19:01:22.903Z","tsv":"'/api':207 '/api/v1/payments/94':57,172 '/docs':206 '/pricing':208 '/readme':210 '/request':13,28 '0.02':12,27,89,163 '000':81 '0x8335':86 '20':80 '402':249 '6':93 'Base network API' 'USDC pay-per-call' 'accept':46 'access':62,189 'actual':239 'advertis':119 'agent':261 'ai':131 'amount':75 'analysi':135 'analyt':125 'api':5,20,38,61,96,121,188 'base':8,23,51,82 'base-network' 'beyond':257 'broader':117 'call':4,19,78 'categori':122 'chain':114 'challeng':250 'classif':138 'clear':175 'commit':102 'confirm':244 'connect':216 'content':222 'convers':155 'crypto API access' 'data':124,128,196 'decim':94 'descript':184 'document':193,201,231 'embed':139 'endpoint':55,159,169,238,242,269 'equal':88 'estim':149 'exampl':234 'exchang':144 'export':129 'extrem':203 'feed':143 'financ':140 'function':198 'gas':148 'generat':156 'generic':259 'geocod':153 'given':90 'header':72 'howev':166 'includ':123 'individu':109 'infrastructur':151 'insight':130 'key':97 'know':253 'label':59,260 'learn':133 'limit':99 'list':158 'live':245 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':132 'map':176 'maximum':74 'metric':126 'micropay':115 'micropayment API' 'multipl':120 'name':181 'need':104 'network':9,24,52 'no-api-key' 'on-chain':112 'opaqu':267 'openapi':226 'page':211 'paid':108,268 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,71 'per':3,18,36,77,164 'platform':6,21,39,118 'post':66 'post-endpoint' 'premium':60,187 'price':142,161 'probe':170 'prompt':218 'protocol':44 'quot':147 'rate':98,145 'render':213 'report':127 'request':37,67,106,165 'request/response':229 'requir':64,76 'return':200,240,246 'schema':230 'sentiment':134 'servic':182 'simpli':186 'spars':204 'spec':227 'specif':54,168 'substant':221 'summar':137 'text':136 'token':146 'treat':263 'unit':83 'upfront':101 'usdc':15,30,47,85,91 'usdc-micropayment' 'use':41 'util':152 'valid':154,248 'via':10,25,110 'wallet':217 'web3':141 'without':252 'x402':11,26,43,70 'x402 API' 'x402-payment'","prices":[{"id":"fcb62a92-c8d2-4f7f-b2ab-69ee88b0f980","listingId":"e3f906d3-c83f-447e-95e7-b40106095f3a","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:57.500Z"}],"sources":[{"listingId":"e3f906d3-c83f-447e-95e7-b40106095f3a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/94","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:57.500Z","lastSeenAt":"2026-04-23T19:01:22.903Z"}],"details":{"listingId":"e3f906d3-c83f-447e-95e7-b40106095f3a","quickStartSnippet":"# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.\n# Using curl (you need an x402-compatible client to generate the header):\ncurl -X POST https://lowpaymentfee.com/api/v1/payments/94 \\\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 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/payments/94"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, rate limits, or commitments","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/payments/94"}],"useCases":["Paying per-call for API access without subscriptions or API keys","Integrating x402-compatible agents with a low-cost paid endpoint","Testing x402 protocol payment flows on Base network"],"bestFor":["Agents that support x402 payment protocol on Base","Developers exploring pay-per-request API models with crypto micropayments","Low-volume consumers who want no-commitment API access"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:05.549Z"},"updatedAt":"2026-04-23T19:01:22.903Z"}}