{"id":"5fc9a304-62a2-482a-88c1-ca8e69186afc","shortId":"dyxBpy","kind":"x402","title":"Pay-per-call API platform on Base via x402 — $0.02/request for data, AI, finance, and utility endpoints.","tagline":"Pay-per-call API platform on Base via x402 — $0.02/request for data, AI, finance, and utility endpoints.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/payments/324` is listed as \"Premium API Access\" and accepts x402 payments with a maximum amount of 20,000 base units of USDC (i.e., $0.02 per request). No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment to authenticate each request.\n\nThe platform organizes its endpoints into 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 listed endpoints share the same $0.02/request pricing. The probed endpoint (`/api/v1/payments/324`) returned a valid 402 challenge confirming it is live, using the \"exact\" payment scheme with USDC on Base (contract 0x8335…2913).\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The actual behavior and response format of this specific endpoint remain unknown beyond what the x402 challenge describes (mimeType: application/json, method: POST).","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","json-api","post-method"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay-per-call API","micropayment API","USDC API access","Base network API","low fee API","crypto-paid API"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt","No OpenAPI or schema definition found; request and response formats are unknown","The purpose of the specific endpoint /api/v1/payments/324 ('Premium API Access') is unclear — it does not match any of the named endpoints on the landing page","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/payments/324","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/324","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, confirming pricing and payment details. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual functionality behind \"Premium API Access\" at /api/v1/payments/324 is entirely 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":"2026-04-19T07:07:31.807Z","embedding":[-0.029708862,-0.039520264,0.044921875,0.014602661,0.011314392,-0.028457642,-0.0211792,0.018600464,0.068603516,-0.06591797,0.028717041,-0.05331421,-0.022323608,-0.03640747,-0.02078247,0.019424438,0.0013389587,0.005027771,-0.043395996,0.030731201,0.021774292,-0.018463135,-0.037109375,0.02722168,-0.010192871,-0.019683838,-0.011177063,-0.005065918,-0.02432251,-0.042816162,0.042022705,-0.030410767,-0.014892578,-0.0063438416,-0.01108551,-0.023223877,-0.0020008087,0.027526855,0.023635864,-0.003063202,-0.002811432,-0.064941406,0.013755798,-0.013420105,-0.058563232,-0.00907135,0.010047913,-0.02168274,0.002588272,-0.00079774857,-0.03982544,-0.01071167,-0.002779007,0.0042381287,0.008850098,0.018753052,-0.0056419373,-0.00061035156,0.020874023,0.013755798,-0.006034851,-0.054504395,-0.012840271,-0.013084412,0.007434845,0.04864502,-0.013999939,0.041503906,0.012214661,0.05722046,0.025238037,0.050048828,0.021560669,0.00856781,0.008415222,-0.01737976,-0.008308411,0.05328369,-0.01776123,-0.028121948,-0.010795593,-0.013755798,-0.053588867,-0.008255005,-0.021072388,-0.04425049,-0.014816284,0.022872925,-0.025421143,0.03213501,-0.07739258,-0.008644104,-0.012290955,-0.0058174133,-0.0037841797,-0.01638794,-0.01828003,0.015396118,0.00021147728,0.00945282,-0.0025691986,-0.047546387,0.022766113,0.011169434,0.037353516,0.05419922,0.025848389,0.021591187,0.008598328,-0.019348145,-0.032989502,0.010749817,-0.0042381287,-0.010353088,0.009361267,0.014572144,-0.013801575,0.015792847,-0.031204224,0.01638794,-0.04711914,0.05517578,0.016143799,0.00894928,0.0069351196,-0.042297363,-0.017349243,0.015899658,-0.02519226,-0.0043640137,0.013046265,0.014945984,0.025314331,-0.027023315,-0.030456543,0.014343262,-0.015205383,-0.014793396,-0.043792725,-0.04147339,0.040496826,-0.031066895,0.012916565,0.038024902,-0.094055176,-0.014984131,-0.03845215,0.007030487,-0.029846191,-0.017654419,-0.00063467026,0.020599365,-0.015823364,-0.010154724,-0.019622803,-0.019210815,-0.005039215,0.039611816,-0.01348114,0.03982544,-0.015686035,0.023040771,0.02520752,0.0065689087,0.014434814,0.024124146,0.0006766319,-0.08355713,-0.08148193,-0.021408081,0.0037879944,-0.016448975,-0.031280518,0.0070381165,-0.0052375793,-0.06512451,-0.012481689,-0.010566711,-0.011169434,-0.045898438,-0.006717682,-0.038085938,0.011665344,-0.00674057,-0.05731201,-0.015586853,-0.028152466,0.06518555,0.030914307,0.02166748,0.033172607,-0.00869751,0.05819702,0.026397705,-0.020553589,-0.0138549805,0.019760132,-0.023513794,0.020309448,-0.007785797,0.016189575,-0.034851074,0.046813965,0.07293701,0.017684937,-0.018554688,-0.0037937164,-0.055633545,-0.061950684,-0.03842163,0.029220581,0.005504608,0.0051002502,0.032348633,-0.029205322,-0.023712158,0.020004272,0.014205933,0.009231567,0.066101074,0.014511108,-0.0059547424,0.022384644,0.02279663,-0.049468994,0.044555664,0.032592773,0.014038086,-0.011070251,-0.034454346,0.027526855,0.036712646,-0.029586792,0.019897461,-0.014480591,0.032714844,-0.008972168,0.010673523,0.014526367,-0.014572144,-0.02168274,-0.019729614,-0.026611328,0.025604248,0.009796143,-0.030639648,-0.03164673,-0.08068848,0.042388916,0.026275635,0.039154053,-0.010856628,0.008995056,-0.02722168,-0.015136719,-0.086120605,0.047058105,0.07116699,-0.007698059,-0.019729614,0.022567749,-0.0029468536,-0.04650879,0.011154175,-0.008796692,-0.03201294,-0.022491455,0.015571594,-0.04748535,-0.0020961761,0.026062012,0.031707764,0.05496216,-0.012168884,-0.049804688,-0.020935059,-0.014282227,-0.0070877075,-0.03213501,0.008796692,-0.012649536,0.023757935,0.024642944,-0.0010347366,0.011375427,0.0021820068,-0.0036506653,-0.0050811768,0.007381439,-0.011405945,-0.033935547,0.0209198,0.007980347,-0.06738281,0.0038166046,-0.0022029877,0.07312012,-0.04949951,0.035247803,-0.011428833,0.012069702,0.055358887,-0.007408142,-0.05154419,0.0030059814,0.02458191,0.013420105,0.0395813,0.014801025,-0.026229858,-0.014663696,0.07019043,-0.019195557,-0.003364563,0.0023975372,0.009490967,0.042510986,-0.0025672913,-0.064941406,-0.047454834,-0.0016117096,-0.02532959,0.033233643,-0.018554688,0.026687622,-0.01335907,0.0069999695,-0.01524353,0.0020980835,-0.023040771,0.002609253,-0.0143966675,0.009437561,-0.016326904,-0.023452759,0.02078247,0.0063285828,-0.0062675476,0.011978149,0.04043579,0.014923096,-0.007381439,-0.031219482,-0.03579712,-0.019744873,-0.018920898,0.009674072,0.019882202,0.019958496,0.05496216,-0.0418396,-0.0023021698,0.020446777,0.022094727,0.030227661,-0.0011768341,-0.0014448166,-0.07946777,-0.058410645,-0.02684021,-0.03475952,0.03060913,0.018814087,-0.00062036514,0.06225586,0.0043258667,-0.02709961,-0.03390503,0.019058228,-0.035461426,-0.0028591156,0.043029785,-0.023849487,-0.028839111,0.010032654,-0.016342163,0.008323669,0.038726807,0.016921997,0.021652222,0.070617676,0.041748047,0.007522583,0.018981934,0.017852783,0.025939941,0.0062675476,-0.020217896,-0.023208618,-0.011817932,0.029296875,-0.021240234,-0.02557373,-0.07116699,0.07458496,0.039031982,0.09161377,0.007019043,0.0062332153,0.03414917,-0.018585205,0.019744873,-0.016357422,-0.024673462,-0.024291992,-0.05441284,0.0413208,-0.020263672,-0.004016876,-0.022949219,0.032592773,-0.0032253265,0.020523071,-0.029144287,0.042999268,-0.012229919,-0.0014162064,0.025665283,0.005115509,0.060546875,0.059570312,-0.05038452,0.020706177,0.019378662,-0.035583496,0.0076065063,0.034698486,-0.013534546,-0.0011138916,-0.04788208,-0.021255493,-0.00289917,-0.007949829,-0.06298828,-0.0036697388,0.001830101,0.010910034,0.024291992,-0.0017671585,-0.008354187,-0.0022506714,-0.024856567,-0.060455322,0.00058841705,-0.03793335,0.0007982254,0.028640747,-0.029052734,-0.00013637543,-0.0035381317,-0.0076065063,-0.0030002594,0.019805908,0.028198242,-0.0041160583,-0.040405273,0.030410767,0.009994507,0.0069999695,0.0036525726,0.036193848,0.023925781,0.029434204,0.03616333,0.00982666,-0.009757996,-0.06518555,0.013404846,-0.049102783,0.01133728,0.018127441,-0.027069092,0.0067596436,-0.014099121,-0.034301758,-0.035491943,-0.0019798279,-0.021575928,-0.0027198792,0.01966858,-0.026382446,-0.032806396,-0.050720215,-0.009925842,-0.0047798157,0.06628418,0.02230835,0.016113281,-0.05557251,-0.0040779114,0.012580872,-0.0004787445,0.035491943,-0.0138549805,-0.005569458,-0.014602661,-0.037475586,-0.0074806213,-0.017623901,0.023010254,-0.012466431,-0.001042366,0.029205322,0.0049362183,0.02861023,0.004764557,0.011306763,0.030914307,-0.038208008,-0.0039482117,-0.008483887,0.04220581,0.01525116,-0.00198555,-0.051483154,0.051635742,0.014289856,0.037200928,-0.043426514,-0.005207062,-0.012992859,0.007095337,0.010620117,-0.0023460388,-0.0016822815,-0.012199402,-0.05279541,-0.06390381,0.036254883,-0.014511108,0.028808594,0.020843506,-0.0031604767,0.027023315,-0.013435364,0.010169983,0.021530151,-0.02368164,-0.010635376,-0.025650024,-0.03552246,-0.024475098,-0.01486969,-0.019195557,0.027679443,-0.018417358,0.014404297,-0.004032135,-0.0178833,0.02809143,0.0034217834,-0.0065956116,0.014175415,0.0037136078,0.021652222,0.042144775,0.014816284,-0.04046631,0.026428223,0.006454468,0.0042762756,-0.009315491,0.04711914,0.03265381,-0.0028209686,-0.009170532,-0.009727478,-0.024093628,-0.020950317,0.0090408325,0.011398315,0.015960693,-0.008056641,-0.044677734,0.019851685,0.005344391,-0.039031982,-0.03201294,0.00894928,0.0066719055,-0.04095459,0.02053833,0.020233154,0.06329346,-0.023468018,0.0007195473,0.00868988,0.04046631,0.03829956,0.002696991,-0.002588272,0.018676758,-0.013893127,0.011436462,-0.009788513,-0.023361206,0.020080566,0.0049324036,0.022262573,0.02116394,0.0057144165,-0.02078247,-0.021102905,0.0014848709,-0.021896362,-0.029937744,0.02583313,0.021240234,0.02557373,-0.02758789,0.015167236,0.011260986,-0.020950317,-0.01626587,-0.005142212,0.02760315,-0.015731812,-0.015960693,0.016998291,0.014961243,0.03253174,-0.055541992,-0.012207031,0.009536743,0.013839722,-0.032348633,-0.039886475,-0.03326416,-0.0013113022,0.039215088,0.00995636,0.019943237,0.037353516,0.010055542,0.0064201355,0.022888184,0.004486084,-0.017578125,-0.0073776245,-0.047698975,-0.01676941,-0.0063591003,0.0004553795,-0.02909851,0.014213562,-0.009971619,-0.03237915,0.006198883,-0.022415161,-0.0012979507,-0.0138168335,0.0109939575,0.03527832,0.0019798279,0.017288208,-0.027252197,-0.035186768,-0.008026123,0.008087158,0.023468018,-0.051818848,0.014907837,-0.009712219,-0.0068206787,0.0029830933,0.002998352,0.021575928,0.02230835,0.01322937,0.031143188,-0.042175293,0.045440674,-0.022125244,0.012130737,0.005264282,-0.030090332,-0.010429382,-0.01966858,-0.014343262,0.039489746,-0.03173828,-0.013702393,-0.031204224,-0.050842285,-0.012413025,-0.06060791,0.022399902,0.039245605,0.040893555,-0.021881104,0.0027656555,0.0005044937,0.007019043,-0.02267456,0.0029659271,-0.0137786865,0.020965576,0.017654419,-0.0007042885,-0.0345459,-0.029922485,-0.019866943,0.009178162,-0.045196533,-0.05343628,-0.0078048706,-0.0012512207,-0.0048942566,-0.014793396,-0.022033691,-0.039916992,-0.0019817352,-0.04168701,0.011459351,0.0071983337,0.019546509,0.00944519,-0.025924683,-0.0013971329,0.011375427,-0.013946533,0.03302002,0.014419556,-0.012123108,-0.0362854,0.008674622,0.01902771,0.017700195,-0.00970459,-0.015357971,-0.001124382,-0.023101807,-0.050231934,-0.0074272156,-0.001950264,-0.012496948,-0.009223938,0.00554657,-0.047424316,0.0005507469,-0.020050049,0.005836487,0.021408081,0.012763977,0.007774353,0.0011959076,0.010444641,-0.0039138794,-0.013160706,-0.03086853,0.022979736,0.010032654,0.0065193176,0.02960205,0.04208374,0.003955841,-0.036865234,0.0079956055,0.006000519,0.019119263,-0.01991272,0.016098022,-0.016464233,0.010314941,-0.009155273,-0.01235199,-0.031433105,-0.004966736,0.083618164,0.0033359528,-0.013839722,-0.018554688,-0.019470215,0.025436401,0.037261963,-0.035095215,0.0042762756,-0.02331543,0.014793396,-0.030197144,0.010429382,0.004798889,0.024490356,-0.019073486,-0.053375244,-0.008224487,-0.0059013367,-0.00806427,-0.07293701,-0.033569336,-0.07507324,0.0057296753,-0.017044067,-0.017974854,0.0016241074,0.009719849,-0.02470398,-0.08734131,0.0025520325,0.047027588,0.0048942566,0.027557373,-0.008148193,0.02432251,0.025604248,-0.039611816,-0.0025138855,0.029937744,-0.021560669,-0.00831604,-0.023803711,0.019943237,-0.01689148,-0.00047636032,0.003074646,0.00907135,0.0146102905,-0.0057144165,0.0060424805,-0.015083313,0.01902771,-0.019744873,0.0093307495,0.00033688545,-0.011253357,0.044006348,-0.05328369,0.026382446,0.0076026917,-0.003736496,0.014457703,0.034118652,0.039733887,-0.041381836,-0.012031555,0.01977539,0.0121536255,0.03149414,-0.013511658,0.04449463,0.009025574,-0.015991211,0.010368347,-0.008995056,-0.009544373,-0.026321411,-0.021270752,0.021820068,-0.00030827522,0.0074653625,-0.019378662,0.0033359528,0.012619019,0.0063705444,0.016860962,-0.010795593,-0.017120361,-0.018630981,-0.0019836426,0.011077881,0.01360321,-0.002450943,0.024414062,0.029449463,0.026245117,0.0069351196,-0.011680603,0.0005040169,0.03262329,-0.010124207,-0.0009198189,0.030380249,0.008094788,0.01889038,0.026733398,0.008460999,-0.044525146,-0.007865906,-0.026351929,-0.017715454,-0.00085783005,-0.0102005005,-0.013244629,-0.0011672974,0.005405426,-0.011016846,-0.027511597,0.0035858154,-0.029632568,-0.019424438,-0.0063591003,-0.007965088,0.030334473,0.0079956055,0.013160706,0.0041885376,0.0016307831,0.034606934,-0.0058174133,-0.0118255615,0.036346436,0.02508545,0.013214111,-0.029052734,-0.0017786026,-0.010032654,-0.008384705,0.0011701584,-0.033111572,0.01158905,0.04940796,-0.021408081,0.011077881,0.006187439,0.020690918,0.00053215027,0.0021915436,-0.008392334,0.015602112,-0.0049934387,0.036712646,-0.047973633,0.024765015,0.011413574,0.0021858215,-0.013435364,-0.0053215027,-0.029891968,0.023544312,0.0039138794,-0.0016965866,0.048339844,0.0047569275,0.025985718,-0.0234375,-0.020904541,0.002128601,-0.027923584,-0.02268982,0.014381409,-0.0076828003,0.008621216,0.008178711,-0.026062012,0.028656006,-0.02645874,0.026885986,0.007183075,0.0030822754,-0.002412796,-0.01979065,-0.0071258545,-0.019515991,-0.018554688,0.0067825317,-0.0039711,0.04168701,0.019104004,0.029434204,0.04776001,0.01007843,-0.006679535,-0.043884277,-0.027359009,0.0042381287,-0.010719299,0.017227173,-0.020233154,0.052246094,0.03643799,0.0058403015,0.039398193,0.030456543,0.036224365,0.00061273575,0.010650635,-0.012962341,0.012420654,-0.010475159,0.027130127,-0.008987427,0.03845215,-0.04031372,0.028793335,0.016571045,0.027740479,-0.02861023,0.03378296,0.06506348,0.01838684,-0.008911133,0.042541504,-0.0074424744,-0.00024008751,-0.0129776,-0.0234375,0.051208496,-0.0024547577,0.046875,0.04925537,0.011016846,-0.0016155243,0.021530151,-0.026885986,-0.022613525,0.061431885,0.02420044,-0.0234375,-0.016189575,-0.0017604828,-0.00137043,-0.04928589,-0.01777649,0.026504517,-0.008888245,0.016342163,-0.010681152,-0.0064849854,-0.009223938,0.0019416809,0.013404846,0.023101807,-0.018341064,0.02507019,0.032989502,0.00076532364,0.027938843,0.0030536652,0.023330688,-0.029067993,-0.02909851,0.016860962,0.021987915,-0.012252808,-0.013534546,0.021835327,0.0058288574,0.03756714,0.04559326,-0.02319336,0.0025196075,0.02973938,0.009208679,-0.000333786,0.06085205,0.027511597,0.01348114,0.047607422,0.02748108,0.027709961,-0.043060303,0.025268555,0.0073509216,0.0068244934,-0.012786865,-0.012908936,0.0028476715,-0.015525818,0.026168823,-0.0015907288,-0.017562866,0.024459839,0.025878906,-0.009292603,-0.0021018982,-0.0019035339,0.010009766,-0.019744873,-0.0050086975,0.007965088,-0.01802063,0.024612427,0.011604309,0.031555176,-0.018844604,0.032287598,0.005214691,-0.014640808,-0.0029277802,0.028656006,-0.035980225,0.0011692047,0.003730774,-0.005004883,-0.051818848,0.014305115,0.031173706,-0.005783081,0.022521973,0.010757446,-0.0019207001,-0.0012550354,0.029663086,0.008903503,0.007133484,-0.011772156,-0.023330688,0.02394104,0.04486084,0.00207901,0.004486084,-0.032165527,0.0033302307,0.007949829,-0.008476257,-0.009155273,-0.008796692,-0.018417358,-0.017608643,0.007217407,0.024658203,0.020477295,0.048950195,-0.021743774,-0.018173218,0.018554688,0.032440186,0.0019054413,0.0033836365,-0.008392334,0.018157959,-0.021759033,0.03967285,0.030914307,0.012794495,0.03451538,-0.0050621033,-0.015975952,0.014762878,-0.012741089,0.021026611,-0.026275635,-0.0002799034,0.008422852,0.029891968,-0.019515991,-0.03579712,0.0008096695,-0.020309448,-0.028457642,-0.025177002,0.019195557,0.0043296814,0.03378296,0.040008545,0.01928711,-0.029067993,0.06121826,-0.008033752,0.045135498,0.00024962425,-0.015792847,0.046875,0.026885986,0.030273438,0.013923645,0.011924744,-0.03479004,0.02027893,0.032989502,0.027679443,0.012641907,0.00061035156,-0.018676758,0.034240723,-0.003528595,0.03164673,-0.006340027,-0.00020289421,0.021270752,-0.0033874512,-0.010612488,-0.0076828003,-0.0070228577,0.005077362,0.050933838,-0.025924683,-0.01727295,-0.021972656,-0.01184845,0.027709961,-0.009307861,0.008056641,0.015136719,-0.020355225,0.016021729,-0.026153564,-0.02558899,0.01108551,0.025619507,-0.04751587,-0.017120361,0.0072364807,0.019317627,-0.022018433,0.035888672,0.024093628,-0.0010881424,0.010437012,0.04800415,-0.012924194,0.020736694,-0.017471313,0.027023315,0.03677368,-0.0020503998,-0.016448975,-0.0010232925,0.010971069,-0.009315491,0.020950317,0.029022217,-0.014381409,0.0040130615,0.002292633,-0.0047950745,-0.004550934,0.0056991577,-0.005680084,0.005947113,-0.011634827,-0.014175415,0.0039711,0.011047363,-0.0037002563,0.010513306,-0.0005645752,-0.011062622,0.0048332214,0.03994751,0.019821167,-0.041748047,-0.0005970001,0.0067481995,0.008277893,-0.033721924,-0.0060157776,0.007701874,-0.036621094,0.014961243,0.026733398,0.019866943,0.0143966675,-0.028244019,0.0022583008,0.02645874,0.012184143,0.019561768,-0.000013530254,-0.002664566,0.015060425,-0.021362305,-0.003534317,-0.009628296,-0.011657715,0.012123108,0.033569336,-0.0015497208,-0.03050232,0.0287323,0.00157547,0.0056381226,-0.0026187897,-0.014793396,0.0113220215,-0.0059318542,0.0011320114,-0.000050723553,0.016082764,-0.0104904175,-0.017288208,-0.00983429,0.042541504,0.05291748,-0.011741638,-0.011627197,0.023971558,0.018798828,0.016220093,0.03945923,0.0020141602,0.040283203,0.01927185,-0.023971558,-0.026000977,0.020355225,-0.016342163,-0.028427124,0.014793396,-0.015716553,-0.0101623535,0.009361267,0.007785797,-0.0013751984,-0.03225708,-0.008621216,-0.0129470825,-0.014205933,0.021499634,-0.009086609,0.019195557,-0.029434204,-0.007446289,0.006626129,-0.02784729,-0.043426514,-0.022018433,0.00085783005,-0.01612854,-0.059265137,0.014778137,-0.026794434,0.0035305023,-0.018966675,0.0007882118,-0.011268616,0.025817871,-0.010597229,-0.0029792786,0.00774765,0.02178955,0.02532959,0.00021028519,0.021316528,-0.029281616,-0.022613525,-0.023391724,0.00831604,-0.014137268,0.018356323,-0.0024681091,0.036132812,0.02722168,-0.018875122,0.0034770966,-0.013092041,-0.007019043,-0.009269714,-0.019760132,-0.02331543,0.026489258,0.0143585205,-0.012245178,-0.00856781,0.042022705,-0.030807495,-0.007209778,0.02709961,0.04345703,0.0035533905,0.036010742,-0.012954712,0.00024092197,-0.019714355,0.007537842,-0.0143585205,0.010261536,0.000060081482,0.0028705597,-0.006275177,0.010169983,0.021865845,-0.012794495,-0.0059432983,0.03378296,0.015342712,-0.008369446,0.042633057,0.017471313,0.013679504,-0.005996704,-0.0070495605,0.013282776,0.051879883,0.004535675,0.008415222,0.001074791,0.0062446594,-0.016036987,0.015991211,0.017211914,-0.016204834,-0.04598999,-0.011146545,-0.026809692,0.02456665,0.00005441904,0.006378174,-0.012451172,0.010871887,-0.023757935,-0.036499023,-0.021270752,0.033477783,0.01676941,-0.008079529,-0.011489868,0.01486969,0.014801025,-0.031585693,0.0019931793,-0.048828125,-0.04144287,-0.009307861,-0.021484375,0.017364502,0.012435913,-0.0064201355,-0.0032176971,-0.008201599,-0.00223732,-0.001914978,0.028427124,-0.009376526,-0.010803223,0.026351929,0.02319336,-0.014587402,0.017333984,-0.017028809,0.0001244545,0.01159668,-0.0034389496,0.010505676,-0.021331787,0.039794922,-0.012962341,-0.0074539185,0.030731201,-0.0022392273,0.012817383,-0.033599854,0.0020771027,-0.009605408,-0.010093689,0.03744507,-0.026794434,-0.020553589,0.01007843,-0.011878967,-0.018814087,-0.0018472672,0.019424438,0.03125,-0.0096206665,0.043823242,-0.020614624,-0.0033454895,0.016464233,0.011222839,-0.016281128,0.008140564,0.025726318,0.005897522,-0.008117676,-0.010383606,-0.010101318,-0.026916504,-0.008728027,0.018493652,-0.0013332367,-0.018676758,0.025390625,0.01687622,0.045654297,-0.011039734,0.0121154785,0.017089844,0.0047340393,0.031982422,-0.0029563904,0.043670654,-0.0037136078,-0.031433105,-0.001408577,-0.0025043488,-0.030456543,-0.00036120415,-0.001291275,-0.00054597855,-0.04269409,0.00072050095,-0.0041923523,0.015930176,-0.014907837,0.0071258545,-0.021636963,0.005622864,-0.043548584,-0.0036697388,-0.035003662,0.014137268,0.033081055,-0.00055122375,0.026763916,0.0029201508,-0.015266418,0.021972656,0.048461914,-0.0046157837,-0.03161621,-0.022018433,0.0065612793,0.0031414032,0.012680054,0.003774643,-0.02180481,-0.014228821,0.0011053085,-0.018798828,0.00712204,-0.018630981,0.019836426,0.006614685,-0.0004618168,-0.011520386,0.020645142,-0.0032176971,-0.0088272095,0.008163452,0.011924744,0.025283813,0.03552246,-0.020553589,0.021270752,0.02229309,-0.038146973,0.053466797,0.0017900467,0.028198242,-0.014381409,0.002998352,-0.0385437,-0.03173828,-0.0154953,-0.0032024384],"createdAt":"2026-04-18T18:50:32.585Z","updatedAt":"2026-04-23T21:32:17.357Z","lastSeenAt":"2026-04-23T21:32:17.357Z","tsv":"'/api':202 '/api/v1/payments/324':69,173 '/docs':200 '/pricing':201 '/readme':204 '/request':12,31,168 '0.02':11,30,92,167 '000':86 '0x8335':193 '20':85 '2913':194 '402':177 'Base network API' 'USDC API access' 'accept':77 'access':75 'actual':236 'advertis':102 'ai':15,34,135 'amount':83 'analysi':139 'analyt':129 'api':5,24,45,74,96 'application/json':254 'attach':105 'authent':117 'avail':231 'base':8,27,63,87,191 'base-network' 'behavior':237 'beyond':247 'broad':50 'call':4,23 'caller':103 'catalog':51 'categori':127 'challeng':178,251 'classif':142 'confirm':179 'connect':210 'contract':192 'convers':159 'crawl':234 'crypto-paid API' 'data':14,33,128,132 'describ':252 'detail':217 'document':195,226 'embed':143 'enabl':44 'endpoint':19,38,57,67,124,163,172,244 'estim':153 'exact':185 'exampl':230 'exchang':148 'export':133 'extrem':197 'feed':147 'financ':16,35,144 'format':240 'four':126 'gas':152 'generat':160 'geocod':157 'header':110 'i.e':91 'infrastructur':155 'insight':134 'json-api' 'key':97 'learn':137 'limit':100 'list':71,162 'live':182 'low fee API' 'lowpaymentfee.com':39 'machin':136 'maximum':82 'method':255 'metric':130 'micropayment API' 'mimetyp':253 'network':64 'offer':48 'openapi':221 'organ':122 'page':205 'pay':2,21,54 'pay-per-cal':1,20 'pay-per-call API' 'pay-per-request':53 'payment':79,109,115,186 'per':3,22,55,93 'per-request-billing' 'platform':6,25,46,121 'post':256 'post-method' 'premium':73 'price':146,169 'probe':171 'prompt':212 'quot':151 'rate':99,149 'remain':245 'render':207 'report':131 'request':56,94,119 'request/response':224 'respons':239 'return':174 'schema':225 'scheme':187 'sentiment':138 'settl':58 'share':164 'simpli':104 'spars':198 'spec':222 'specif':66,243 'summar':141 'technic':216 'text':140 'token':150 'unit':88 'unknown':246 'usag':229 'usdc':60,90,189 'usdc-settlement' 'use':183 'util':18,37,156 'valid':113,158,176 'via':9,28 'wallet':211 'web3':145 'x':108 'x-payment':107 'x402':10,29,43,78,114,250 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"9a0fef7f-e3b8-4199-9acd-955da8305252","listingId":"5fc9a304-62a2-482a-88c1-ca8e69186afc","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/324","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:50:32.585Z"}],"sources":[{"listingId":"5fc9a304-62a2-482a-88c1-ca8e69186afc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/payments/324","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:50:32.585Z","lastSeenAt":"2026-04-23T21:32:17.357Z"}],"details":{"listingId":"5fc9a304-62a2-482a-88c1-ca8e69186afc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/payments/324 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/payments/324"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/payments/324"}],"useCases":["Programmatic access to paid API endpoints without API key management","Agent-driven workflows that need on-demand, per-call billing via x402","Accessing data, AI inference, finance, or utility services with crypto micropayments"],"bestFor":["Developers or agents wanting zero-signup, pay-as-you-go API access","x402-compatible clients on the Base network","Low-volume or bursty workloads where per-request pricing is economical"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads requiring SLAs, rate-limit guarantees, or support contracts","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:06.787Z"},"updatedAt":"2026-04-23T21:32:17.357Z"}}