{"id":"93976d1f-cfbd-4c45-8b17-d195527b0efb","shortId":"Cm2LsG","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 `/api/v1/products/26` is listed as \"Premium API Access\" and returns an x402 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 x402 payment header to each 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 priced uniformly at $0.02 per request.\n\nThis particular endpoint (`/api/v1/products/26`) is labeled \"Premium API Access\" but the crawled material does not clarify what data or functionality it returns beyond that label. There is no OpenAPI schema, no request/response examples, and the docs pages returned only a wallet-connect prompt with no substantive documentation. Callers should expect a JSON response (the challenge specifies `application/json` MIME type) via HTTP POST, but the exact input parameters and output shape are unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["api-marketplace","crypto"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","premium api access"],"warnings":["No OpenAPI or schema documentation available — input parameters and response shape are unknown","Docs, API, pricing, and README pages all returned only a wallet-connect prompt with no content","The label 'Premium API Access' does not describe what the endpoint actually does","No request or response examples could be found or inferred"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/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/products/26","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 challenge, but there is no OpenAPI schema, no documentation beyond a landing page listing, and no request/response examples. The actual functionality behind 'Premium API Access' is entirely opaque, making this 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":"2026-04-18T21:20:33.960Z","embedding":[-0.010421753,-0.036193848,0.042388916,0.019638062,0.006576538,-0.033721924,-0.013458252,0.041503906,0.07159424,-0.063964844,0.030181885,-0.06439209,-0.03692627,-0.03060913,-0.027786255,0.011070251,0.008674622,0.0082473755,-0.04937744,0.021408081,0.021087646,-0.011070251,-0.03314209,0.033081055,0.0073928833,-0.00774765,-0.010719299,0.0005955696,-0.0060653687,-0.03390503,0.0317688,-0.027633667,-0.002922058,0.007698059,-0.008094788,-0.011627197,-0.0029773712,0.048675537,0.035095215,0.003080368,-0.004425049,-0.06756592,0.0040779114,-0.030288696,-0.048187256,-0.0051460266,0.001540184,-0.030822754,0.00014734268,-0.0014390945,-0.021072388,-0.0127334595,-0.0074806213,-0.0039711,0.0048980713,0.0026569366,0.014816284,-0.0008378029,0.0036125183,0.018615723,-0.0058021545,-0.07489014,-0.015357971,-0.01689148,0.01373291,0.05505371,-0.010917664,0.032196045,0.0022792816,0.06311035,0.021514893,0.050354004,0.025665283,0.024734497,-0.008102417,0.005176544,-0.0041770935,0.04748535,-0.0021133423,-0.023376465,-0.012107849,-0.016708374,-0.04156494,0.0020599365,-0.015235901,-0.045959473,-0.016220093,0.024093628,-0.02532959,0.029205322,-0.07751465,-0.0015029907,-0.019226074,-0.0038757324,-0.008071899,-0.0068473816,-0.010948181,0.033355713,-0.00027251244,0.011444092,0.007896423,-0.029144287,0.006881714,0.0037269592,0.02116394,0.037353516,0.036102295,0.023498535,0.006286621,-0.01424408,-0.017456055,0.0077781677,-0.014533997,0.0043182373,0.016555786,0.0011692047,-0.0127334595,0.016983032,-0.035186768,0.02432251,-0.045898438,0.048583984,0.0031433105,-0.002313614,0.0088272095,-0.031951904,-0.009307861,0.025604248,-0.02482605,-0.013389587,0.021743774,0.0065231323,0.024749756,-0.025360107,-0.03857422,0.015106201,-0.022857666,-0.0137786865,-0.05419922,-0.023880005,0.02760315,-0.028030396,0.029891968,0.039031982,-0.0904541,-0.022857666,-0.043029785,0.010398865,-0.035949707,0.0008583069,-0.0013809204,0.023391724,-0.013626099,-0.01512146,-0.030288696,-0.027526855,0.0033283234,0.03326416,-0.016296387,0.047607422,-0.016937256,0.012367249,0.029541016,0.00472641,0.019836426,0.018753052,0.0033569336,-0.070617676,-0.07348633,-0.012916565,-0.008712769,-0.013427734,-0.018722534,0.005004883,-0.007331848,-0.0715332,-0.020889282,-0.0209198,-0.0012521744,-0.043060303,-0.007221222,-0.039489746,0.016799927,-0.025024414,-0.06976318,-0.018692017,-0.033843994,0.044891357,0.020217896,0.016082764,0.02142334,-0.026184082,0.066101074,0.01638794,-0.0043144226,-0.024047852,0.031951904,-0.02911377,0.023757935,-0.0024929047,0.024856567,-0.02885437,0.027816772,0.060699463,0.01525116,-0.02861023,-0.018447876,-0.052825928,-0.03967285,-0.035308838,0.019943237,0.0036392212,-0.007247925,0.048583984,-0.029327393,-0.02859497,0.009811401,0.016723633,0.017440796,0.066223145,0.0072669983,-0.008285522,0.024536133,0.016159058,-0.053649902,0.036102295,0.03173828,0.00774765,-0.0060157776,-0.03286743,0.023513794,0.027816772,-0.019195557,0.0040130615,-0.020385742,0.024932861,-0.0012083054,0.0076408386,0.01133728,-0.02255249,-0.008995056,-0.03564453,-0.015701294,0.028778076,0.0030670166,-0.030319214,-0.03894043,-0.09265137,0.045440674,0.03515625,0.048431396,0.0032863617,0.019943237,-0.019012451,-0.015213013,-0.06707764,0.056762695,0.06951904,-0.00044369698,-0.01285553,0.013046265,-0.019836426,-0.03326416,0.012535095,-0.020309448,-0.03390503,-0.007041931,0.012374878,-0.047943115,0.0047454834,0.025741577,0.02015686,0.048950195,-0.01209259,-0.05090332,-0.02166748,-0.011177063,-0.00466156,-0.022964478,0.016723633,-0.01499939,0.010803223,0.0010604858,-0.005466461,0.019592285,-0.0069351196,0.011230469,-0.004524231,-0.0096206665,-0.00548172,-0.016845703,0.01739502,0.009651184,-0.0597229,-0.0007991791,-0.006706238,0.06982422,-0.04373169,0.041168213,-0.0054512024,0.020996094,0.06100464,-0.001042366,-0.05722046,-0.006893158,0.030319214,0.02508545,0.041931152,0.016143799,-0.04763794,-0.005001068,0.08868408,-0.008361816,0.00022792816,0.018920898,0.005874634,0.033691406,-0.015068054,-0.06323242,-0.013450623,-0.0035305023,-0.04977417,0.028961182,-0.025268555,0.032348633,-0.01739502,-0.0036239624,-0.013679504,-0.005393982,-0.041900635,-0.0046958923,-0.00982666,0.010391235,-0.022338867,-0.009536743,0.0064888,0.0047798157,-0.017623901,0.012916565,0.023773193,0.030578613,-0.012329102,-0.029922485,-0.024093628,0.0017204285,0.00819397,0.025161743,0.021514893,0.014350891,0.043029785,-0.031799316,0.007472992,0.024475098,0.02545166,0.03479004,-0.0035438538,-0.0014734268,-0.05834961,-0.04928589,-0.02734375,-0.05029297,0.026062012,0.030670166,-0.009971619,0.053253174,0.0033779144,-0.012451172,-0.0552063,0.030075073,-0.04071045,0.00087690353,0.040283203,-0.019836426,-0.037109375,-0.0040359497,0.0014972687,-0.0013132095,0.04147339,0.024032593,0.034729004,0.07104492,0.049468994,0.0075531006,0.021514893,-0.0011472702,0.032928467,0.005847931,-0.0112838745,-0.046325684,-0.031097412,0.026412964,-0.025054932,-0.009315491,-0.08105469,0.05343628,0.032348633,0.09588623,0.019378662,0.0087890625,0.03994751,-0.017486572,0.007888794,-0.021209717,-0.009223938,-0.023071289,-0.042938232,0.024139404,-0.010429382,-0.0045166016,-0.025054932,0.03564453,-0.00995636,0.021484375,-0.03010559,0.049926758,0.0011978149,-0.022247314,0.013580322,0.019424438,0.058135986,0.05819702,-0.036193848,0.028274536,0.043029785,-0.023284912,0.0056648254,0.039733887,-0.01676941,-0.008659363,-0.048858643,-0.020263672,-0.0046043396,0.0057907104,-0.05227661,-0.0022182465,0.005619049,0.011070251,0.036254883,-0.0087890625,-0.01033783,0.0041999817,-0.010543823,-0.05114746,-0.006336212,-0.034484863,0.004131317,0.038726807,-0.02520752,-0.016143799,0.0019369125,-0.016052246,-0.013549805,-0.0002539158,0.020568848,0.0064048767,-0.03265381,0.032318115,0.0121536255,0.010070801,0.020568848,0.02609253,0.021972656,0.034362793,0.03765869,0.0135650635,-0.0074653625,-0.04727173,0.017837524,-0.04083252,0.008308411,0.025985718,-0.020324707,-0.00019979477,-0.025253296,-0.03010559,-0.01725769,0.012542725,-0.024749756,0.0042304993,0.024429321,-0.015319824,-0.026275635,-0.058502197,-0.024017334,-0.010765076,0.07055664,0.01890564,0.01146698,-0.06854248,-0.01638794,0.019180298,0.008026123,0.027862549,-0.015182495,-0.0058517456,-0.023544312,-0.03390503,-0.0021476746,-0.0262146,0.023803711,-0.011444092,-0.013221741,0.024536133,0.002588272,0.03677368,-0.005039215,0.014823914,0.023773193,-0.020965576,-0.005710602,-0.0129470825,0.048034668,0.020706177,-0.011306763,-0.060058594,0.03845215,0.005962372,0.026565552,-0.04333496,-0.0042266846,-0.014663696,0.014961243,0.009483337,0.003583908,-0.010406494,-0.009796143,-0.052978516,-0.07556152,0.03845215,-0.031311035,0.027923584,0.029891968,0.0007944107,0.038970947,-0.009101868,-0.0068206787,0.012466431,-0.025558472,-0.012756348,-0.012191772,-0.032104492,-0.026657104,-0.013450623,-0.021514893,0.02015686,-0.02116394,0.019897461,0.0020370483,-0.015655518,0.021102905,0.0017299652,0.006614685,0.016433716,-0.0013542175,0.026733398,0.040161133,0.0065841675,-0.052246094,0.009307861,-0.0060806274,0.011451721,-0.0008215904,0.041381836,0.03274536,-0.0016555786,-0.0062446594,-0.017456055,-0.013206482,-0.02848816,0.008598328,0.0019035339,0.009880066,-0.0038604736,-0.03466797,0.0038890839,0.0024795532,-0.029708862,-0.030471802,0.015548706,0.022247314,-0.028900146,0.015213013,0.03604126,0.04522705,-0.031402588,-0.008148193,0.014984131,0.020874023,0.034729004,0.009712219,-0.012840271,0.020904541,-0.012290955,0.014015198,-0.0049324036,-0.016845703,0.026901245,-0.008140564,0.014518738,0.021957397,0.0015096664,-0.017440796,-0.026855469,0.000011265278,-0.014892578,-0.020996094,0.033447266,0.025238037,0.033447266,-0.02079773,0.014144897,0.021575928,-0.018692017,-0.009468079,-0.016738892,0.037078857,-0.00095558167,-0.01890564,0.011016846,0.014984131,0.039123535,-0.054901123,0.0018186569,0.004016876,0.0026359558,-0.019836426,-0.034118652,-0.043640137,0.01965332,0.05053711,0.019256592,0.016296387,0.028274536,0.009056091,0.010696411,0.030395508,0.0013771057,-0.012893677,-0.02658081,-0.030136108,-0.012588501,-0.007820129,0.00047922134,-0.034210205,0.019714355,-0.004589081,-0.028747559,0.005947113,-0.01512146,0.0019798279,0.000001013279,0.0050201416,0.03717041,-0.004749298,0.013801575,-0.00957489,-0.040374756,-0.0041999817,0.0045166016,0.011581421,-0.046325684,0.0070610046,-0.004146576,-0.0060272217,0.01474762,0.025344849,0.022872925,0.024383545,0.01651001,0.031066895,-0.044708252,0.033233643,-0.039794922,0.010597229,0.008964539,-0.046875,-0.014320374,-0.019714355,-0.013290405,0.039398193,-0.022109985,-0.0073127747,-0.018203735,-0.037200928,-0.017196655,-0.052825928,0.01675415,0.046142578,0.03552246,-0.015342712,0.0045166016,0.0040626526,0.012077332,-0.013473511,0.008293152,-0.015609741,0.0345459,0.019927979,-0.015213013,-0.03326416,-0.01763916,-0.029541016,0.0047569275,-0.028213501,-0.052703857,-0.011520386,-0.005004883,-0.006839752,-0.008468628,-0.007835388,-0.023406982,-0.0016460419,-0.038970947,0.016708374,0.019424438,0.017868042,0.009277344,-0.034423828,-0.0021190643,0.02255249,-0.014801025,0.041870117,0.0017786026,-0.0044059753,-0.040985107,0.019638062,0.024368286,0.030883789,0.0015525818,-0.016830444,-0.007019043,-0.017654419,-0.06719971,-0.008132935,-0.0103302,-0.02067566,-0.00087690353,-0.014350891,-0.054901123,-0.0023822784,-0.015945435,0.00046944618,0.0131073,0.022964478,0.0061836243,0.0098724365,0.008049011,-0.0023441315,0.004436493,-0.028640747,0.024673462,0.011360168,-0.00037407875,0.032043457,0.049072266,-0.0018720627,-0.0181427,0.001663208,-0.0009822845,0.027862549,-0.020050049,-0.0012388229,-0.012275696,0.016586304,-0.010131836,-0.016693115,-0.033843994,0.0030574799,0.088012695,-0.0010185242,-0.006866455,-0.023391724,-0.020263672,0.009712219,0.020889282,-0.05038452,-0.011459351,-0.021316528,0.023498535,-0.01675415,0.021347046,0.008491516,0.02722168,-0.008987427,-0.03729248,-0.025344849,-0.0044441223,-0.00819397,-0.061340332,-0.02986145,-0.06201172,0.014091492,-0.025878906,-0.021377563,0.0029468536,0.009216309,-0.017318726,-0.07800293,0.011985779,0.0501709,0.008255005,0.024414062,-0.012252808,0.020553589,0.022857666,-0.03805542,-0.005680084,0.028137207,-0.026916504,-0.027191162,-0.020004272,0.0051460266,-0.0026798248,-0.005634308,0.009796143,0.0020103455,0.022460938,-0.0006723404,0.005252838,-0.014770508,0.016296387,-0.016860962,0.008911133,-0.014198303,-0.0126571655,0.03439331,-0.0496521,0.019042969,0.02053833,-0.027786255,0.0043640137,0.020614624,0.02645874,-0.031463623,-0.019119263,0.015899658,0.012268066,0.026535034,-0.025253296,0.04650879,0.005897522,-0.030456543,0.017791748,-0.023223877,-0.019699097,-0.021194458,-0.035186768,0.024108887,-0.010406494,0.01600647,-0.036010742,-0.002658844,0.016189575,-0.00082206726,-0.0012168884,-0.006866455,-0.018112183,-0.017425537,0.0026931763,-0.0063591003,-0.0103302,-0.00078725815,0.021560669,0.022064209,0.0335083,0.005886078,-0.01574707,0.005821228,0.03213501,-0.012969971,-0.0006008148,0.014663696,-0.00012290478,0.017028809,0.013946533,0.025512695,-0.040740967,-0.0060272217,-0.031585693,-0.011650085,0.0034828186,0.0031604767,-0.007888794,-0.011505127,0.005970001,-0.0041503906,-0.037902832,-0.003709793,-0.024841309,-0.03677368,0.0046806335,-0.03375244,0.025787354,0.0041885376,0.0035533905,0.004371643,-0.0004208088,0.042175293,0.007671356,-0.012321472,0.019744873,0.025344849,0.0060195923,-0.018966675,-0.006591797,-0.002986908,0.0040512085,0.0015592575,-0.039093018,-0.000120937824,0.04449463,-0.016860962,-0.00023496151,0.021453857,0.019378662,-0.006340027,0.005428314,-0.001572609,0.018295288,-0.00030732155,0.040161133,-0.040527344,0.022857666,0.015686035,-0.00061655045,-0.022018433,-0.0178833,-0.02848816,0.024673462,0.008392334,-0.009056091,0.052124023,0.008422852,0.026397705,-0.01902771,-0.038635254,0.008430481,-0.023071289,-0.01574707,0.016113281,-0.010467529,-0.004310608,0.013595581,-0.033172607,0.041625977,-0.04840088,0.016830444,-0.001159668,-0.005657196,0.006362915,-0.012962341,-0.008995056,0.005844116,-0.021057129,0.011375427,0.0010175705,0.05218506,0.010620117,0.038024902,0.055999756,0.02166748,-0.001083374,-0.0362854,-0.020507812,0.0020751953,-0.023376465,0.033447266,-0.016189575,0.064331055,0.031433105,-0.00028896332,0.028182983,0.024429321,0.025344849,0.010040283,0.01676941,-0.010147095,0.00844574,0.0022907257,0.03213501,0.0051612854,0.03503418,-0.031219482,0.033691406,0.008003235,0.035980225,-0.034454346,0.030853271,0.07574463,0.019729614,-0.018005371,0.05593872,-0.011672974,-0.015701294,-0.005748749,-0.009902954,0.049713135,0.017196655,0.039489746,0.043060303,0.0009074211,0.00083875656,0.014801025,-0.033355713,-0.029678345,0.059936523,0.03555298,-0.01777649,-0.010421753,0.0005583763,0.012008667,-0.043518066,-0.028167725,0.025527954,-0.01159668,0.0030269623,-0.018569946,-0.00086832047,-0.006137848,0.007572174,0.030136108,0.0071868896,-0.004814148,0.027648926,0.035461426,0.0007863045,0.02784729,0.0017738342,0.022659302,-0.035705566,-0.016555786,0.025253296,0.019638062,-0.015777588,-0.011894226,0.0259552,0.016311646,0.039154053,0.046966553,-0.02394104,0.013748169,0.030853271,0.0049972534,-0.012367249,0.044311523,0.03564453,0.005432129,0.039154053,0.025924683,0.032043457,-0.032592773,0.016113281,0.0049858093,0.008422852,-0.010040283,-0.00308609,0.007686615,-0.013313293,0.010353088,-0.0028686523,-0.012870789,0.032409668,0.027862549,0.0004117489,-0.0069732666,-0.013206482,0.016036987,-0.009140015,-0.0074882507,0.0154953,-0.011062622,0.041046143,0.015068054,0.02796936,-0.0063209534,0.016204834,-0.0064697266,-0.010940552,-0.0012989044,0.012489319,-0.047729492,0.013366699,-0.0011520386,0.0037193298,-0.05178833,0.018371582,0.034942627,-0.009529114,0.03390503,0.012786865,-0.010467529,0.0051460266,0.029205322,0.013450623,0.000106692314,-0.0046081543,-0.02130127,0.019744873,0.0501709,-0.007472992,0.0026245117,-0.02494812,-0.008575439,0.006263733,-0.010414124,-0.0016460419,-0.008415222,-0.010063171,-0.033233643,0.020462036,0.033569336,0.028427124,0.06008911,-0.005832672,-0.0018844604,0.010971069,0.040985107,0.006652832,-0.0020866394,0.003862381,0.0075531006,-0.015716553,0.05105591,0.022201538,0.013412476,0.032165527,-0.01234436,-0.014717102,0.017288208,-0.012367249,0.029525757,-0.009864807,0.0017023087,-0.0013828278,0.024017334,-0.021057129,-0.040161133,0.0077209473,-0.021514893,-0.01902771,-0.018096924,0.00082063675,0.010574341,0.022003174,0.040252686,0.030288696,-0.029708862,0.061279297,-0.015449524,0.039520264,-0.007331848,-0.013069153,0.049072266,0.013839722,0.03527832,0.02760315,0.015106201,-0.030136108,0.02229309,0.025466919,0.031982422,0.005558014,0.0005426407,-0.017471313,0.038757324,-0.005191803,0.027862549,0.0021800995,0.0004336834,0.020339966,-0.0045051575,-0.0026760101,-0.002035141,-0.009712219,0.008239746,0.040740967,-0.021865845,0.002155304,-0.026611328,-0.017974854,0.022857666,-0.0115356445,0.0018882751,0.0028152466,-0.03338623,0.021896362,-0.025177002,-0.030960083,0.002796173,0.018951416,-0.043548584,-0.0010604858,0.00061273575,0.017593384,-0.009353638,0.040740967,0.01701355,0.0017671585,0.0014533997,0.047302246,-0.004486084,0.024353027,-0.01084137,0.018569946,0.045532227,-0.0027561188,-0.021255493,0.0071868896,0.0070152283,-0.011436462,0.016723633,0.030075073,-0.017730713,0.007499695,-0.009101868,-0.0030822754,-0.0037174225,0.016403198,-0.014877319,0.011779785,-0.018798828,-0.013725281,0.002708435,0.010375977,-0.002254486,0.0023403168,-0.008323669,-0.0096206665,0.021438599,0.03930664,0.02041626,-0.028137207,-0.0037899017,-0.007911682,0.019821167,-0.018356323,-0.0135650635,0.0013046265,-0.041534424,0.009941101,0.014945984,0.007408142,0.011306763,-0.02154541,-0.0034275055,0.030395508,0.02078247,0.023391724,0.012390137,0.0054512024,0.013641357,-0.021896362,-0.010932922,-0.012107849,0.000344038,0.010688782,0.019195557,-0.0053138733,-0.025482178,0.026245117,0.0039863586,0.016082764,0.00032806396,-0.03201294,0.033111572,-0.010696411,-0.0074272156,-0.0015878677,0.007774353,-0.010856628,-0.0053710938,-0.015975952,0.047943115,0.055511475,-0.014465332,-0.0070991516,0.026046753,0.014549255,0.010131836,0.042022705,0.0019216537,0.051818848,0.017990112,-0.031341553,-0.0317688,0.038909912,-0.009689331,-0.02835083,0.010391235,-0.016036987,-0.01499939,0.014213562,0.016830444,0.00031113625,-0.023376465,-0.018539429,-0.007385254,-0.0042419434,0.026687622,-0.015090942,0.0075798035,-0.0107803345,-0.008636475,0.0063972473,-0.023361206,-0.06222534,-0.021621704,-0.00081682205,-0.011924744,-0.055358887,-0.001701355,-0.017364502,0.0056381226,-0.022140503,-0.009735107,-0.01826477,0.014465332,-0.017181396,0.0012845993,0.017852783,0.02079773,0.019699097,0.0001937151,0.013534546,-0.018600464,-0.03338623,-0.030822754,0.00023460388,-0.0071411133,0.029708862,0.0056381226,0.032592773,0.030929565,0.0065689087,-0.007408142,-0.004180908,0.0028018951,-0.012290955,-0.021011353,-0.020553589,0.026626587,0.009239197,-0.0040893555,-0.010650635,0.049346924,-0.023391724,-0.010421753,0.025878906,0.050872803,0.013343811,0.030960083,-0.014480591,-0.006603241,-0.014892578,0.009864807,-0.01852417,-0.0029354095,0.017715454,-0.0024967194,-0.008666992,0.0038394928,0.02456665,-0.010917664,-0.008934021,0.026473999,0.0016965866,-0.0135269165,0.037231445,0.010444641,0.008163452,-0.010391235,-0.021194458,0.02027893,0.049072266,0.015174866,0.009269714,-0.0039749146,0.000052332878,-0.016052246,0.004135132,0.01247406,-0.013420105,-0.04559326,-0.021102905,-0.028381348,0.030426025,-0.00856781,0.0032024384,-0.0071411133,0.013244629,-0.0056915283,-0.023590088,-0.022964478,0.023025513,0.019561768,-0.020401001,-0.015586853,0.009613037,0.013290405,-0.0395813,-0.00655365,-0.03857422,-0.03010559,0.00056886673,-0.025787354,0.027740479,0.014945984,-0.011383057,-0.005252838,-0.002960205,-0.0011749268,-0.006587982,0.032226562,-0.01335907,-0.007751465,0.040649414,0.022491455,-0.018493652,0.018341064,-0.024520874,-0.0020656586,0.017700195,-0.0056915283,0.0084991455,-0.020736694,0.02935791,-0.0076408386,-0.01739502,0.0317688,0.0015916824,0.014083862,-0.024871826,0.0095825195,-0.007446289,-0.0029773712,0.034454346,-0.022262573,-0.01625061,0.012664795,-0.01751709,-0.021331787,0.0033168793,0.023880005,0.025360107,-0.011932373,0.039855957,-0.019042969,-0.010910034,0.023101807,0.010910034,-0.021820068,0.0008983612,0.04547119,0.0002527237,-0.0019760132,0.009422302,-0.018661499,-0.021453857,-0.0029087067,0.01838684,-0.006893158,-0.014656067,0.029815674,0.008682251,0.051513672,-0.012306213,0.019226074,0.006729126,-0.008224487,0.020401001,0.007045746,0.06021118,-0.0020599365,-0.015777588,0.019866943,0.0047721863,-0.028564453,0.005142212,-0.007843018,-0.0007991791,-0.039489746,0.02949524,-0.007106781,0.022064209,-0.027557373,0.010391235,-0.02279663,0.0055351257,-0.03363037,0.0011034012,-0.019134521,0.010498047,0.04336548,0.010887146,0.030792236,-0.0015068054,-0.033416748,0.010681152,0.049621582,-0.0057296753,-0.033325195,-0.011009216,0.024459839,0.0021076202,0.023513794,0.0054397583,-0.02204895,-0.026550293,0.008056641,-0.004360199,0.005874634,0.009277344,0.02859497,0.007724762,0.0025844574,0.0020332336,0.030426025,-0.009460449,-0.003566742,0.0135650635,0.011520386,0.031951904,0.021392822,-0.01751709,0.01890564,0.011734009,-0.041778564,0.061767578,0.0047836304,0.019927979,-0.022338867,0.0037174225,-0.046539307,-0.021331787,-0.014762878,0.0064315796],"createdAt":"2026-04-18T18:34:36.575Z","updatedAt":"2026-04-23T19:00:35.603Z","lastSeenAt":"2026-04-23T19:00:35.603Z","tsv":"'/api/v1/products/26':56,156 '/request':13,28 '0.02':12,27,78,150 '000':72 '20':71 'accept':46 'access':62,92,161 'across':108 'advertis':83 'ai':118 'analysi':122 'analyt':112 'api':5,20,38,61,85,160 'application/json':210 'attach':95 'base':8,23,51,73 'base network api' 'beyond':175 'broader':104 'call':4,19,80 'caller':93,201 'categori':110 'challeng':67,208 'clarifi':168 'classif':125 'connect':195 'convers':142 'crawl':164 'data':111,115,170 'doc':188 'document':200 'embed':126 'endpoint':55,107,145,155 'estim':136 'exact':218 'exampl':185 'exchang':131 'expect':203 'export':116 'feed':130 'financ':127 'four':109 'function':172 'gas':135 'generat':143 'geocod':140 'header':99 'http':214 'http-post' 'i.e':77 'infrastructur':138 'input':219 'insight':117 'instant':91 'json':205 'json-response' 'key':86 'label':158,177 'learn':120 'limit':89 'list':58 'low payment fee' 'lowpaymentfee.com':31 'machin':119 'materi':165 'metric':113 'micropayment api' 'mime':211 'network':9,24,52 'no-api-key' 'offer':106 'openapi':181 'output':222 'page':189 'paramet':220 'particular':154 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,98 'per':3,18,36,79,151 'platform':6,21,39,82,105 'post':215 'premium':60,159 'premium api access' 'price':129,147 'prompt':196 'protocol':44 'quot':134 'rate':88,132 'report':114 'request':37,68,102,152 'request/response':184 'respons':206 'return':64,174,190 'schema':182 'sentiment':121 'shape':223 'simpli':94 'specif':54 'specifi':209 'substant':199 'summar':124 'text':123 'token':133 'type':212 'uniform':148 'unit':74 'unknown':225 'usdc':15,30,47,76 'usdc api' 'usdc-base-network' 'use':41 'util':139 'valid':141 'via':10,25,213 'wallet':194 'wallet-connect':193 'web3':128 'x402':11,26,43,66,97 'x402 api' 'x402-payment'","prices":[{"id":"0715979f-c8d1-4b5e-bc6b-a3f12abd8301","listingId":"93976d1f-cfbd-4c45-8b17-d195527b0efb","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/products/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":"2026-04-18T18:34:36.575Z"}],"sources":[{"listingId":"93976d1f-cfbd-4c45-8b17-d195527b0efb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:36.575Z","lastSeenAt":"2026-04-23T19:00:35.603Z"}],"details":{"listingId":"93976d1f-cfbd-4c45-8b17-d195527b0efb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/26 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns an x402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/products/26"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","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"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/products/26"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 protocol payments","Agents that need frictionless, keyless API access at low cost","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:17:20.684Z"},"updatedAt":"2026-04-23T19:00:35.603Z"}}