{"id":"573b5784-bef7-457d-97d4-7dd4ec27641c","shortId":"UGYvyq","kind":"x402","title":"Pay-per-request API platform on Base (USDC) via x402 — $0.02/call, no API keys required.","tagline":"Pay-per-request API platform on Base (USDC) via x402 — $0.02/call, no API keys required.","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/policies/89` 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. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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 $0.02 per request.\n\nThis particular endpoint (`/api/v1/policies/89`) does not appear in the main site's listed API catalog, and its exact functionality is unclear — the description is simply \"Premium API Access\" with no further documentation. The docs, pricing, and README pages all render only a wallet-connect prompt with no substantive content. Without an OpenAPI schema, request/response examples, or detailed documentation, the actual behavior of this endpoint remains unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","http-post"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","low payment fee API","crypto-paid API"],"warnings":["The endpoint /api/v1/policies/89 does not appear in the site's public API catalog — its purpose is unknown.","No OpenAPI schema, request body format, or response schema is available.","All documentation pages (docs, pricing, README, api) render only a wallet-connect prompt with no content.","The exact functionality behind 'Premium API Access' is unspecified; callers cannot know what data or service is returned."],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/89","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/policies/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, no documentation beyond a title, and the endpoint's actual functionality is completely undocumented. The docs/pricing/README pages are empty wallet-connect stubs.","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":"2026-04-19T08:04:42.567Z","embedding":[-0.015182495,-0.041778564,0.03189087,0.011413574,0.023483276,-0.015670776,-0.040985107,0.02357483,0.074279785,-0.058685303,0.027282715,-0.0519104,-0.030548096,-0.030838013,-0.01689148,0.016464233,-0.009567261,0.0012083054,-0.0368042,0.04345703,0.025787354,-0.0056533813,-0.043121338,0.030471802,0.018829346,-0.022369385,0.0056915283,-0.007446289,-0.011451721,-0.051330566,0.039123535,-0.038238525,-0.019470215,0.0022354126,-0.019104004,-0.021499634,-0.007965088,0.032684326,0.026824951,0.008331299,-0.004055023,-0.07714844,0.0029563904,-0.0074424744,-0.046875,0.0126571655,0.009902954,-0.02947998,-0.007335663,-0.009727478,-0.02671814,-0.0014410019,-0.01651001,-0.0006890297,0.014595032,0.016525269,0.0023765564,-0.00070142746,0.0082473755,0.010398865,0.0041885376,-0.060058594,-0.022140503,0.01210022,0.004486084,0.0637207,0.0014839172,0.03363037,0.015586853,0.06298828,0.046539307,0.06222534,0.026947021,0.019302368,-0.010368347,-0.022094727,-0.010475159,0.06427002,-0.02519226,-0.014228821,-0.0019321442,-0.0036392212,-0.038879395,-0.0021514893,-0.011856079,-0.03543091,-0.029663086,0.00894928,-0.0055122375,0.01727295,-0.054260254,-0.008926392,-0.025436401,0.004295349,-0.0043640137,-0.02027893,-0.014663696,0.032989502,-0.0058021545,0.02482605,-0.01966858,-0.05331421,0.014007568,0.021469116,0.04525757,0.056152344,0.013450623,0.015296936,0.017501831,-0.022857666,-0.03704834,0.01486969,-0.011405945,0.001408577,0.019958496,0.008506775,-0.020980835,0.035827637,-0.017944336,0.0231781,-0.05508423,0.044403076,0.012306213,-0.019012451,0.0057525635,-0.055145264,-0.02079773,0.023834229,-0.022979736,-0.014152527,0.031555176,0.011047363,0.021987915,-0.021469116,-0.03164673,0.028152466,-0.000086545944,-0.023529053,-0.048706055,-0.026565552,0.032836914,-0.024780273,0.02268982,0.034423828,-0.118652344,0.0003874302,-0.044006348,0.00037765503,-0.030700684,-0.015205383,0.00554657,0.028335571,-0.0045166016,-0.024963379,-0.035003662,-0.030441284,0.0082473755,0.031433105,-0.0015058517,0.055725098,-0.028411865,0.046203613,0.015068054,0.006931305,0.031280518,0.02709961,-0.0010795593,-0.076538086,-0.08984375,-0.026123047,-0.018753052,-0.007461548,-0.027938843,0.013595581,-0.010231018,-0.0748291,-0.0135650635,-0.02218628,-0.0026493073,-0.04168701,0.0075569153,-0.029144287,0.00315094,-0.017318726,-0.05718994,-0.01751709,-0.03640747,0.052215576,0.011497498,0.013656616,0.020202637,-0.017318726,0.061523438,0.023452759,-0.021392822,-0.0340271,0.0127334595,-0.027938843,0.025360107,0.0017986298,-0.002632141,-0.030548096,0.05001831,0.07348633,-0.009033203,-0.013504028,-0.00459671,-0.06506348,-0.055145264,-0.041992188,0.013397217,0.0154800415,-0.011871338,0.024719238,-0.04345703,-0.03656006,0.0022830963,0.02859497,0.019836426,0.07196045,-0.012031555,-0.004016876,0.023345947,0.031463623,-0.042236328,0.052825928,0.013931274,0.023773193,-0.035614014,-0.01991272,0.012527466,0.041107178,-0.026565552,0.009284973,-0.026290894,0.024429321,-0.006362915,0.0040740967,0.008972168,-0.017990112,-0.0065727234,-0.026260376,-0.017059326,0.023712158,0.0037765503,-0.034118652,-0.028793335,-0.06329346,0.045440674,0.03314209,0.036590576,-0.00491333,-0.006996155,-0.03543091,-0.01499939,-0.0637207,0.060272217,0.06976318,-0.0070114136,-0.01096344,0.020965576,0.0043563843,-0.015701294,-0.014175415,-0.020050049,-0.036865234,-0.010292053,0.009864807,-0.02897644,0.0065956116,0.01676941,0.036315918,0.041046143,-0.0036201477,-0.040618896,-0.011253357,0.003440857,-0.0060272217,-0.025115967,0.004940033,-0.007434845,-0.0024299622,0.0046081543,0.0039863586,0.034362793,-0.0048942566,0.001868248,-0.006099701,-0.00016391277,-0.009552002,-0.041381836,0.025222778,-0.00041508675,-0.057281494,0.0062828064,0.0033035278,0.068725586,-0.06341553,0.032287598,-0.015975952,0.010513306,0.06036377,0.0047416687,-0.038391113,0.0064964294,0.031433105,0.018081665,0.0345459,0.015327454,-0.024337769,-0.009552002,0.06463623,-0.025314331,-0.01914978,0.008590698,0.008804321,0.034088135,-0.009346008,-0.046020508,-0.030853271,0.006462097,-0.042938232,0.021194458,-0.010726929,0.026870728,-0.0146865845,0.0005297661,-0.014579773,0.0038890839,-0.0262146,0.010986328,-0.030334473,0.009132385,-0.016555786,-0.007461548,-0.0118255615,0.024383545,-0.0006465912,0.011703491,0.0236969,0.01638794,-0.0006260872,-0.021087646,-0.016403198,-0.028701782,0.006175995,0.017028809,0.017028809,0.019332886,0.053955078,-0.023086548,0.006298065,0.019958496,0.01687622,0.023254395,-0.013641357,0.004348755,-0.07043457,-0.068237305,-0.018478394,-0.018936157,0.028518677,-0.0054473877,-0.0006427765,0.045837402,0.0016098022,-0.019683838,-0.049041748,0.025604248,-0.038757324,-0.0035648346,0.030670166,-0.025878906,-0.034362793,0.023666382,-0.011375427,0.0027561188,0.045318604,0.02760315,0.024124146,0.06842041,0.049835205,0.00089120865,0.034301758,0.02128601,0.023620605,0.0033187866,-0.03475952,-0.03010559,-0.016204834,0.05105591,-0.02041626,-0.021026611,-0.06500244,0.045837402,0.026275635,0.07623291,0.01876831,0.017166138,0.03753662,-0.0129852295,0.0154418945,-0.015258789,0.00022172928,-0.035583496,-0.028533936,0.015823364,-0.011154175,0.0007548332,-0.03353882,0.03652954,-0.015686035,0.020355225,-0.023788452,0.050811768,-0.020629883,-0.0036888123,0.017715454,0.00944519,0.04916382,0.06451416,-0.046661377,0.02204895,0.028076172,-0.018157959,-0.003967285,0.038085938,-0.015716553,-0.022720337,-0.04937744,-0.033691406,-0.021209717,0.008178711,-0.05618286,0.006893158,0.0066986084,0.010475159,0.011138916,-0.020095825,-0.0029563904,-0.004989624,-0.018249512,-0.054718018,0.02166748,-0.031799316,-0.0007658005,0.057434082,-0.012512207,-0.0046310425,0.009315491,-0.011184692,0.009262085,0.024780273,0.031707764,0.0033721924,-0.0435791,0.03186035,0.0119018555,0.0018177032,0.032409668,0.040527344,0.024978638,0.04473877,0.033966064,0.028747559,-0.02760315,-0.058898926,0.023849487,-0.053741455,0.009017944,0.014930725,-0.019165039,0.0023593903,-0.026748657,-0.03152466,-0.03250122,0.02381897,-0.035095215,-0.00019598007,0.024032593,-0.019058228,-0.028152466,-0.04901123,-0.01586914,-0.0029125214,0.05419922,0.033325195,0.0016584396,-0.059265137,-0.0009765625,0.015686035,0.01789856,0.03479004,-0.014480591,-0.004825592,-0.030258179,-0.025512695,-0.025665283,-0.03274536,0.03062439,-0.012687683,-0.025665283,0.004562378,-0.0028419495,0.008682251,0.0062675476,0.009727478,0.020019531,-0.030960083,-0.008102417,-0.016174316,0.02911377,0.005367279,-0.006324768,-0.038146973,0.033599854,0.004058838,0.029067993,-0.028274536,-0.009796143,-0.012023926,0.004673004,0.011268616,-0.007621765,-0.008453369,-0.0098724365,-0.050109863,-0.07269287,0.051330566,-0.019058228,0.03302002,0.01966858,0.0206604,0.02217102,-0.0043258667,0.000044465065,0.016555786,-0.012718201,-0.010803223,-0.015686035,-0.024520874,-0.04232788,-0.005420685,-0.025375366,0.032226562,-0.013031006,0.028961182,-0.0068855286,-0.014572144,0.02508545,-0.008255005,-0.010925293,0.008483887,0.002527237,0.015510559,0.033843994,0.00894165,-0.037506104,0.017456055,0.011314392,0.015586853,-0.008171082,0.029083252,0.031677246,-0.01802063,0.010688782,-0.00080013275,-0.024368286,-0.015312195,-0.005115509,0.016830444,0.021835327,0.005317688,-0.03652954,0.0068473816,0.013114929,-0.032043457,-0.032714844,0.015426636,0.015930176,-0.05114746,0.027786255,0.027191162,0.052337646,-0.019927979,0.009552002,-0.0009803772,0.03414917,0.0016794205,0.02255249,-0.010437012,0.017730713,-0.015419006,0.0045280457,-0.007472992,-0.005722046,0.031143188,0.0033092499,0.015670776,0.016906738,0.009887695,-0.024154663,-0.034118652,0.008026123,-0.017028809,-0.022415161,0.028793335,0.009742737,0.023208618,-0.028717041,0.022323608,0.029067993,-0.017807007,-0.017547607,-0.00957489,0.046569824,-0.022903442,-0.012779236,-0.00019645691,0.016052246,0.02684021,-0.05343628,-0.00049591064,0.0004723072,0.0014181137,-0.024230957,-0.045043945,-0.032043457,0.0005583763,0.042755127,0.011749268,0.013656616,0.030471802,0.010513306,0.01625061,0.025680542,0.0047416687,-0.008850098,-0.01914978,-0.034606934,-0.016174316,-0.007335663,0.0023040771,-0.038116455,0.009666443,-0.014259338,-0.030029297,0.012413025,-0.010032654,-0.005306244,0.0054244995,-0.005519867,0.021362305,-0.00053453445,0.021026611,-0.019927979,-0.034362793,-0.001709938,0.0093688965,0.025009155,-0.036376953,0.014045715,-0.007850647,-0.0135269165,0.008491516,0.014503479,0.022705078,0.04144287,0.009216309,0.034423828,-0.04473877,0.04055786,-0.027023315,0.007980347,-0.00011199713,-0.020751953,-0.0011863708,-0.00982666,-0.018051147,0.035461426,-0.013282776,-0.0076828003,-0.025131226,-0.03390503,-0.01197052,-0.060272217,0.0056533813,0.03555298,0.04046631,-0.019180298,-0.0039100647,0.0017004013,-0.0059928894,-0.019683838,0.010375977,-0.005836487,0.024780273,0.018341064,0.003622055,-0.047180176,-0.024597168,-0.018325806,0.017562866,-0.037109375,-0.03970337,-0.0069465637,0.005657196,-0.008369446,-0.020889282,-0.026916504,-0.03756714,-0.0016994476,-0.04385376,0.0037956238,-0.004688263,-0.0032291412,0.006576538,-0.032043457,0.012550354,0.014778137,-0.026245117,0.033203125,-0.0032615662,0.00024962425,-0.047058105,0.021881104,0.017166138,0.024032593,-0.00724411,-0.017150879,-0.0053901672,-0.027359009,-0.04598999,0.0024795532,-0.0012655258,-0.016571045,0.0066871643,0.0022296906,-0.051330566,-0.0076026917,-0.014907837,0.011985779,0.023025513,0.005718231,0.008865356,0.0068359375,0.007621765,-0.0064735413,0.011054993,-0.041046143,0.012969971,0.010688782,0.0082092285,0.022033691,0.0491333,0.008735657,-0.014335632,0.0155181885,-0.00083065033,0.019119263,-0.024551392,0.004058838,-0.019760132,-0.0054359436,-0.010749817,-0.017974854,-0.03829956,0.0051116943,0.0859375,-0.0026512146,-0.0024852753,-0.002243042,-0.019851685,0.018844604,0.04574585,-0.029708862,-0.0063171387,-0.02029419,0.021133423,-0.016479492,0.010124207,0.00079870224,0.010932922,-0.021453857,-0.05038452,-0.012451172,0.008422852,-0.012786865,-0.056671143,-0.025543213,-0.07019043,-0.004722595,-0.0045814514,-0.036865234,-0.0069007874,-0.0006055832,-0.01386261,-0.07965088,-0.00074243546,0.050872803,0.017547607,0.025756836,-0.0030956268,0.023040771,0.027648926,-0.05404663,-0.010002136,0.026824951,-0.03186035,-0.021560669,-0.033294678,0.024246216,-0.019058228,-0.011001587,-0.0009832382,0.0072402954,0.013015747,-0.00881958,0.009712219,-0.025115967,0.020751953,-0.022369385,0.033935547,-0.016113281,-0.004146576,0.039611816,-0.047851562,0.01889038,0.01159668,-0.009536743,-0.0069389343,0.02973938,0.04031372,-0.0491333,-0.020126343,0.02671814,0.008430481,0.048095703,-0.03616333,0.054779053,0.01838684,-0.030334473,0.018615723,-0.008415222,-0.017852783,-0.04562378,-0.025497437,0.009750366,-0.016799927,0.022598267,-0.023284912,0.010482788,0.013931274,0.008056641,0.008682251,-0.019515991,-0.027679443,-0.03111267,0.0014925003,0.0068092346,-0.010238647,-0.0041275024,0.024856567,0.023529053,0.047424316,0.013145447,-0.010025024,0.0121154785,0.027389526,-0.010292053,0.002073288,0.016189575,0.0037784576,0.0109939575,0.024780273,0.008995056,-0.04434204,-0.012809753,-0.019317627,-0.011131287,-0.003768921,-0.0021419525,0.004573822,-0.016921997,0.0061950684,-0.0017623901,-0.03265381,0.008354187,-0.025863647,-0.033721924,-0.000063061714,-0.015655518,0.017044067,-0.011627197,0.0053138733,0.007194519,-0.005756378,0.04537964,-0.0015802383,-0.014152527,0.017318726,0.045837402,0.009544373,-0.018936157,-0.0096588135,-0.011360168,-0.0036449432,0.00030183792,-0.03543091,0.007843018,0.046783447,-0.015197754,0.0033435822,0.006465912,0.03503418,-0.013473511,0.0072669983,0.0076446533,0.026550293,-0.01977539,0.041168213,-0.04663086,0.015014648,0.0078125,0.01071167,-0.0028381348,-0.017059326,-0.025421143,0.0074272156,0.00642395,-0.021102905,0.057403564,-0.00028586388,0.032958984,-0.013916016,-0.028335571,0.0015525818,-0.027526855,-0.016143799,0.035217285,-0.0075912476,0.006690979,0.014129639,-0.012802124,0.041778564,-0.03616333,0.003534317,0.019180298,-0.016113281,-0.003501892,-0.027359009,-0.014411926,0.00063180923,-0.00046396255,0.014389038,-0.0022201538,0.043701172,0.020736694,0.025680542,0.04385376,0.0126571655,0.0016679764,-0.043670654,-0.022338867,-0.0035114288,-0.023025513,0.015823364,-0.014984131,0.053131104,0.033477783,0.012924194,0.035888672,0.026535034,0.031341553,0.0067825317,0.0129470825,-0.010894775,0.026351929,0.0000218153,0.03213501,-0.0032405853,0.037200928,-0.035980225,0.02494812,0.009841919,0.022918701,-0.02494812,0.036315918,0.06561279,0.014701843,-0.00037169456,0.043060303,-0.003929138,-0.01727295,-0.0065727234,-0.013893127,0.050354004,-0.005897522,0.055419922,0.046417236,0.016860962,-0.0007519722,0.030258179,-0.03225708,-0.026626587,0.0680542,0.024154663,-0.03189087,-0.011528015,-0.0015354156,0.00041103363,-0.04220581,-0.03375244,0.024276733,0.00051259995,-0.006954193,-0.004962921,-0.0008163452,-0.013542175,0.0019569397,0.010147095,-0.0038013458,-0.009796143,0.02822876,0.039093018,-0.002603531,0.018737793,-0.0011940002,0.037902832,-0.023117065,-0.016601562,0.011505127,0.016357422,-0.011009216,-0.010650635,0.010292053,0.014724731,0.04385376,0.044067383,-0.021408081,0.01386261,0.01889038,0.009025574,-0.0010976791,0.043823242,0.049682617,0.0057792664,0.030471802,0.027679443,0.033599854,-0.033294678,0.009803772,-0.018112183,0.010398865,-0.013954163,-0.015068054,0.016525269,-0.021774292,-0.0007314682,-0.010047913,0.0008049011,0.02809143,0.03250122,0.003107071,-0.009086609,-0.006187439,0.010643005,-0.020965576,-0.0044937134,0.005748749,-0.014320374,0.03164673,0.02357483,0.019500732,-0.026565552,0.030227661,-0.0038471222,-0.026000977,0.009742737,0.004299164,-0.033294678,0.0014600754,-0.010650635,0.0069007874,-0.042510986,0.0071144104,0.030075073,-0.00063610077,0.02619934,0.013771057,0.0062446594,-0.021072388,0.017410278,0.014480591,-0.0031528473,-0.0101623535,-0.01826477,0.017730713,0.026977539,-0.00907135,0.005355835,-0.021316528,0.004878998,0.0061683655,0.0052719116,0.0040016174,-0.0064697266,-0.019104004,-0.028442383,0.007881165,0.039611816,0.023254395,0.05505371,-0.02154541,0.00010854006,-0.007583618,0.035247803,-0.0020999908,-0.000395298,-0.0022945404,0.021438599,-0.01802063,0.048431396,0.03314209,0.010620117,0.024276733,-0.009170532,-0.027786255,0.010025024,-0.014083862,0.012428284,-0.024780273,0.0029945374,-0.0053901672,0.029510498,-0.0041275024,-0.04638672,0.008560181,-0.0126571655,-0.023452759,-0.017959595,0.022232056,0.0013494492,0.013893127,0.022903442,0.014701843,-0.027008057,0.061187744,-0.009552002,0.058135986,-0.014846802,-0.006324768,0.047607422,0.016143799,0.030319214,0.005958557,0.008651733,-0.030578613,0.019607544,0.023605347,0.02885437,0.008476257,0.012588501,-0.004989624,0.033599854,0.0069007874,0.028564453,-0.007129669,-0.004436493,0.01727295,-0.00623703,-0.006439209,-0.011795044,-0.019958496,0.014221191,0.039733887,-0.027633667,-0.008575439,-0.020248413,-0.015945435,0.026565552,-0.023208618,0.01612854,0.006580353,-0.027191162,0.011131287,-0.011772156,-0.0234375,0.0025138855,0.027572632,-0.04876709,-0.009178162,0.0104522705,0.014595032,-0.021026611,0.028152466,0.035308838,0.0039138794,0.006790161,0.047180176,0.0035648346,0.039367676,0.000111460686,0.027816772,0.04147339,0.0007624626,-0.014350891,0.007396698,0.017501831,-0.011512756,0.0069122314,0.0418396,-0.001953125,0.0022964478,-0.0036582947,-0.0044174194,0.0049209595,0.014320374,0.0008196831,0.013725281,-0.009819031,-0.021377563,-0.0020771027,0.0016059875,0.007663727,0.0031833649,-0.0033912659,-0.008598328,0.012825012,0.030944824,0.02545166,-0.024291992,0.001707077,0.020996094,0.009902954,-0.02822876,-0.015792847,-0.011154175,-0.033172607,0.013839722,0.02116394,0.017974854,0.015609741,-0.02746582,-0.004081726,0.027526855,0.016357422,0.012512207,0.000016272068,-0.009185791,0.014480591,-0.012435913,0.0074806213,0.0011062622,-0.012649536,-0.0023937225,0.027191162,0.0037174225,-0.025131226,0.026306152,0.0077209473,0.005672455,-0.004009247,-0.016784668,0.021896362,-0.009132385,-0.003786087,-0.0012149811,0.0003232956,-0.02507019,-0.021865845,-0.015731812,0.043426514,0.044189453,-0.0011234283,-0.015075684,0.025558472,0.01802063,0.020141602,0.039031982,-0.00945282,0.040649414,0.023162842,-0.019882202,-0.026397705,0.022949219,-0.024749756,-0.033843994,0.011543274,-0.014007568,-0.017471313,0.013122559,0.0032100677,-0.0010576248,-0.04348755,-0.010871887,-0.010513306,-0.006752014,0.03829956,-0.009742737,0.012832642,-0.021469116,-0.027755737,0.005455017,-0.029327393,-0.053527832,-0.011558533,-0.0060806274,-0.01914978,-0.057861328,0.011566162,-0.030441284,0.024551392,-0.033325195,-0.006717682,-0.014556885,0.015945435,-0.011230469,0.0013198853,0.009605408,0.02607727,0.018981934,0.011497498,0.02432251,-0.030944824,-0.033416748,-0.01776123,-0.0017757416,-0.015182495,0.0087509155,0.0096206665,0.034820557,0.008148193,-0.007205963,0.005580902,-0.0037231445,-0.01360321,-0.012863159,-0.026687622,-0.025131226,0.025100708,0.018112183,-0.010391235,-0.011169434,0.047332764,-0.026428223,-0.013198853,0.037750244,0.05432129,0.016860962,0.037963867,-0.017669678,-0.0013093948,-0.012870789,0.0058288574,-0.0121154785,-0.0027751923,0.014465332,0.01096344,-0.009483337,0.009780884,0.008956909,-0.010292053,-0.0073051453,0.034240723,0.015426636,-0.0019626617,0.03213501,0.0039405823,0.0032157898,-0.009132385,0.0017557144,0.017807007,0.056549072,0.013839722,0.010017395,-0.0021324158,0.008911133,-0.015426636,0.0007548332,0.0031642914,-0.021560669,-0.050476074,-0.015686035,-0.021820068,0.025527954,-0.0077781677,0.0154953,-0.005065918,0.02897644,-0.011230469,-0.021026611,-0.023086548,0.023803711,0.007873535,-0.011787415,-0.008682251,0.014411926,0.027450562,-0.036193848,0.0022258759,-0.024841309,-0.022216797,-0.0008125305,-0.03643799,0.03451538,0.022491455,0.0033912659,-0.003616333,-0.0021800995,-0.01247406,-0.0061836243,0.018661499,-0.008590698,-0.004966736,0.029846191,0.020843506,-0.02027893,0.010871887,-0.00082826614,-0.0006804466,0.010650635,-0.0061302185,0.022094727,-0.015670776,0.032043457,-0.011741638,-0.0025520325,0.030807495,-0.0012760162,0.020996094,-0.040100098,0.009162903,-0.007835388,-0.012611389,0.040374756,-0.03527832,-0.029922485,0.0003643036,-0.021392822,-0.039642334,0.006412506,0.010299683,0.029190063,-0.014320374,0.0309906,-0.015335083,-0.0059280396,0.02029419,0.019882202,-0.008605957,0.006275177,0.023483276,-0.0014429092,-0.0017719269,-0.017471313,-0.00932312,-0.0178833,-0.011962891,0.02104187,-0.00944519,-0.022628784,0.016738892,0.014083862,0.037872314,0.004283905,0.011497498,0.0146865845,-0.0017004013,0.028884888,0.02381897,0.0597229,-0.013023376,-0.033691406,-0.00057554245,0.0072402954,-0.029510498,-0.0035247803,-0.011444092,-0.0034370422,-0.029006958,0.014266968,-0.0059890747,0.0028877258,-0.023544312,0.012779236,-0.026504517,-0.008415222,-0.04159546,-0.0124435425,-0.026565552,0.008407593,0.03829956,-0.0006737709,0.021057129,0.0061035156,-0.015129089,0.020843506,0.041931152,-0.01146698,-0.03488159,-0.011604309,0.005748749,0.0047454834,0.008422852,0.016067505,-0.03137207,-0.02078247,0.010025024,-0.015289307,0.0015487671,0.00076532364,0.016418457,0.009857178,-0.0049591064,-0.0015544891,0.014579773,-0.0043792725,0.0012550354,0.010765076,0.0037403107,0.034210205,0.029556274,-0.011245728,0.013618469,0.013763428,-0.044403076,0.04473877,-0.0077552795,0.021118164,-0.023742676,0.008560181,-0.035949707,-0.018112183,0.00028657913,0.0034542084],"createdAt":"2026-04-18T18:52:05.041Z","updatedAt":"2026-04-24T00:32:16.878Z","lastSeenAt":"2026-04-24T00:32:16.878Z","tsv":"'/api/v1/policies/89':60,163 '/call':13,30 '0.02':12,29,82,157 '000':76 '20':75 '402':70 'Base network API' 'USDC micropayment API' 'accept':50 'access':66,96,187 'across':116 'actual':220 'advertis':87 'ai':126 'analysi':130 'analyt':120 'api':5,15,22,32,42,65,89,173,186 'appear':166 'attach':99 'base':8,25,55,77 'behavior':221 'broader':112 'call':84 'caller':97 'catalog':174 'categori':118 'challeng':71 'classif':133 'connect':204 'content':209 'convers':150 'crypto-paid API' 'data':119,123 'descript':182 'detail':217 'doc':193 'document':191,218 'embed':134 'endpoint':59,115,153,162,224 'estim':144 'exact':177 'exampl':215 'exchang':139 'export':124 'feed':138 'financ':135 'four':117 'function':178 'gas':143 'generat':151 'geocod':148 'header':104 'http-post' 'i.e':81 'infrastructur':146 'insight':125 'instant':95 'key':16,33,90 'learn':128 'limit':93 'list':62,155,172 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':127 'main':169 'metric':121 'network':56 'no-api-key' 'offer':114 'openapi':212 'page':197 'particular':161 'pay':2,19,39 'pay-per-call API' 'pay-per-request':1,18,38 'payment':52,103,109 'per':3,20,40,83,158 'platform':6,23,43,86,113 'premium':64,185 'price':137,194 'prompt':205 'proof':110 'protocol':48 'quot':142 'rate':92,140 'readm':196 'remain':225 'render':199 'report':122 'request':4,21,41,72,159 'request/response':214 'requir':17,34 'return':68 'schema':213 'sentiment':129 'simpli':98,184 'site':170 'specif':58 'substant':208 'summar':132 'text':131 'token':141 'unclear':180 'unit':78 'unknown':226 'usdc':9,26,51,80 'usdc-base' 'use':45 'util':147 'valid':107,149 'via':10,27 'wallet':203 'wallet-connect':202 'web3':136 'without':210 'x':102 'x-payment':101 'x402':11,28,47,108 'x402 API' 'x402-payment'","prices":[{"id":"5cb66061-55f3-460b-a724-64a062404818","listingId":"573b5784-bef7-457d-97d4-7dd4ec27641c","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/policies/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:05.041Z"}],"sources":[{"listingId":"573b5784-bef7-457d-97d4-7dd4ec27641c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/89","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:05.041Z","lastSeenAt":"2026-04-24T00:32:16.878Z"}],"details":{"listingId":"573b5784-bef7-457d-97d4-7dd4ec27641c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/89 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 network.","source_url":"https://lowpaymentfee.com/api/v1/policies/89"},{"claim":"The platform lists endpoints at $0.02/request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network.","source_url":"https://lowpaymentfee.com/api/v1/policies/89"},{"claim":"The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to an x402-gated endpoint without subscription commitments"],"bestFor":["Developers or agents wanting zero-signup, pay-per-call API access","x402-compatible wallets and agent frameworks on Base","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited tiers","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.282Z"},"updatedAt":"2026-04-24T00:32:16.878Z"}}