{"id":"1648b0cf-bce7-4a0d-be91-9511311b2d47","shortId":"vURbkf","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","description":"This x402-enabled endpoint at lowpaymentfee.com provides a \"Premium API Access\" transaction receipt via a POST request. It is part of a broader platform offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request, settled in USDC on the Base network.\n\nThe specific probed endpoint (`/api/v1/transactions/1/receipt`) returns a 402 Payment Required challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is made via the x402 exact scheme with no API keys or rate limits required. The platform advertises instant access and a simple pay-per-use model with no minimums or commitments.\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 endpoint is live (402 challenge confirmed), but the actual data returned after payment is unknown. The broader platform lists 16 endpoints across four categories, but none have documented schemas or sample responses.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","crypto payment endpoint"],"warnings":["No documentation available — all doc pages render only 'Connect wallet'","No OpenAPI or schema specification found","No request body or response body examples available","Actual data returned by the receipt endpoint after payment is unknown","The endpoint path includes a hardcoded ID '/transactions/1/receipt' — unclear if parameterizable"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/1/receipt","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/transactions/1/receipt","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, but documentation is effectively nonexistent — every doc page renders only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the actual functionality behind the receipt endpoint is undocumented. The listing is essentially a stub with confirmed liveness.","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":"2026-04-19T12:01:59.185Z","embedding":[-0.028915405,-0.042938232,0.038909912,0.009712219,-0.0073280334,-0.019256592,-0.010917664,0.029724121,0.06060791,-0.0715332,0.027648926,-0.038879395,-0.02583313,-0.034576416,-0.024520874,0.0031433105,0.00007086992,0.022216797,-0.03817749,0.021728516,0.029937744,-0.033935547,-0.03164673,0.029785156,-0.006362915,-0.029785156,-0.027801514,-0.004802704,-0.04058838,-0.03503418,0.045532227,-0.024047852,-0.027572632,0.0102005005,-0.018325806,-0.0024909973,-0.0055618286,0.024398804,0.03375244,-0.01914978,-0.01133728,-0.04522705,0.004245758,-0.010185242,-0.050964355,0.007575989,-0.0011558533,-0.012702942,0.014022827,-0.0057868958,-0.058288574,-0.009284973,0.004295349,0.0112838745,0.0007662773,-0.0033187866,-0.009681702,0.0003938675,0.014549255,0.009140015,-0.0026836395,-0.057922363,-0.020721436,-0.026062012,0.0018873215,0.053131104,-0.023117065,0.061187744,0.018829346,0.056671143,0.03466797,0.048706055,0.028808594,0.018875122,0.014465332,0.0041770935,-0.007980347,0.052124023,-0.030059814,-0.030670166,-0.008659363,-0.020874023,-0.072143555,0.002105713,-0.022628784,-0.040802002,-0.02571106,0.013366699,-0.012901306,0.025421143,-0.06536865,-0.0036525726,0.016189575,0.014717102,-0.003900528,-0.022644043,-0.025527954,0.010856628,-0.014152527,0.017501831,-0.0095825195,-0.037384033,0.031402588,0.005470276,0.039764404,0.050750732,0.005531311,0.031707764,0.0095825195,0.0012273788,-0.009025574,0.029876709,0.02293396,-0.018341064,0.021316528,0.00034070015,-0.012191772,0.0051193237,-0.03363037,0.02420044,-0.038360596,0.05581665,0.0027866364,-0.009559631,0.006839752,-0.04284668,-0.024612427,0.015838623,-0.021270752,0.0019893646,0.031036377,0.028442383,0.01927185,-0.0211792,-0.021591187,0.017044067,-0.017929077,-0.017196655,-0.04321289,-0.049560547,0.027313232,-0.03253174,0.015022278,0.05206299,-0.0904541,-0.004081726,-0.04574585,0.0031375885,-0.01979065,-0.028961182,-0.0019798279,0.0057868958,-0.016281128,-0.011650085,-0.013336182,-0.027786255,0.0087509155,0.055786133,-0.020309448,0.027069092,-0.023498535,0.030227661,0.03225708,0.01637268,0.022399902,0.015060425,-0.00094795227,-0.07336426,-0.086364746,0.0050086975,0.02029419,-0.028884888,-0.041015625,0.0014724731,-0.021575928,-0.07702637,-0.014350891,0.0077056885,-0.008232117,-0.047668457,-0.0010843277,-0.030166626,0.01763916,-0.023666382,-0.03753662,-0.03366089,-0.028961182,0.061920166,0.023162842,0.02116394,0.022537231,-0.013298035,0.039855957,0.01777649,-0.0066184998,-0.018157959,0.008041382,-0.017822266,0.011817932,-0.0060310364,0.0084991455,-0.03366089,0.027786255,0.085754395,0.0030212402,-0.043518066,-0.0036640167,-0.04989624,-0.032562256,-0.012008667,0.023040771,0.0065612793,-0.00894928,0.04537964,-0.04168701,-0.011734009,0.02798462,0.020507812,0.007209778,0.055236816,0.020736694,-0.01675415,0.028518677,0.024963379,-0.033935547,0.05718994,0.022964478,0.02116394,-0.027755737,-0.05178833,0.011810303,0.026443481,-0.027145386,0.013496399,-0.01399231,0.049743652,0.0019445419,-0.004009247,0.025726318,-0.016845703,-0.021728516,-0.023849487,-0.00868988,0.027359009,0.016815186,-0.023254395,-0.046051025,-0.07861328,0.067993164,0.0390625,0.029251099,-0.0022525787,0.0027446747,-0.0152282715,-0.022583008,-0.078186035,0.054779053,0.06530762,-0.011444092,-0.031280518,0.0440979,-0.012680054,-0.03756714,0.004634857,-0.018600464,-0.031799316,-0.013137817,-0.0011034012,-0.04196167,0.003791809,0.002922058,0.002008438,0.056671143,0.010383606,-0.049804688,-0.027282715,-0.01737976,0.012702942,-0.022537231,0.001209259,0.0013875961,0.029312134,0.014205933,0.006427765,0.0023918152,0.014984131,0.006500244,-0.015838623,0.012168884,-0.006652832,-0.02722168,0.0118255615,-0.00021195412,-0.066833496,-0.0027828217,-0.014694214,0.07470703,-0.068359375,0.04156494,-0.018218994,0.003162384,0.06951904,-0.003917694,-0.05529785,0.0033683777,0.02331543,0.009544373,0.029174805,0.013900757,-0.023757935,-0.020248413,0.072631836,-0.017501831,-0.013572693,0.02166748,0.003742218,0.03552246,-0.011001587,-0.061065674,-0.044403076,0.016326904,-0.025009155,0.02772522,-0.021102905,0.03475952,-0.018798828,-0.00868988,-0.034210205,0.010879517,-0.0118637085,0.004108429,-0.02571106,-0.007972717,-0.022491455,-0.013374329,0.033325195,0.0073509216,-0.00749588,0.004638672,0.060699463,0.020904541,-0.007247925,-0.025924683,-0.03668213,-0.022705078,-0.0211792,0.014556885,0.0209198,0.014221191,0.048858643,-0.03479004,0.0069007874,0.038330078,0.009017944,0.03857422,0.0022220612,0.0032253265,-0.0703125,-0.036865234,-0.021316528,-0.045074463,0.034057617,0.020690918,0.0008444786,0.054138184,0.01499176,-0.039367676,-0.036102295,0.02128601,-0.04510498,0.0027656555,0.04937744,-0.017288208,-0.0066070557,-0.007537842,-0.008331299,0.0038433075,0.03048706,0.028076172,0.018829346,0.06573486,0.040771484,-0.002954483,0.024032593,0.005592346,0.020828247,0.0023422241,-0.015792847,-0.028961182,-0.025665283,0.025344849,-0.015151978,-0.021438599,-0.058410645,0.062683105,0.04724121,0.07330322,0.023361206,0.017089844,0.035491943,0.021850586,0.01436615,0.009117126,-0.020446777,-0.036254883,-0.035583496,0.03729248,-0.02230835,-0.0058403015,-0.0079574585,0.03503418,0.003534317,0.01864624,-0.025527954,0.040100098,-0.021331787,-0.0030136108,0.03012085,0.022476196,0.058410645,0.05038452,-0.032287598,0.018127441,0.030334473,-0.046081543,0.01576233,0.022628784,-0.016448975,0.002626419,-0.04586792,-0.03881836,0.005126953,-0.008712769,-0.043548584,0.0071868896,0.009407043,0.014045715,0.031677246,-0.022491455,-0.030044556,0.0074043274,-0.016525269,-0.036468506,-0.006374359,-0.038391113,0.017654419,0.025741577,-0.044158936,0.023925781,-0.0023498535,-0.0049362183,-0.010620117,-0.0013637543,0.0038890839,-0.0058174133,-0.033233643,0.030853271,0.0047340393,0.0036888123,0.006702423,0.033721924,0.013008118,0.04547119,0.03363037,0.008529663,-0.013717651,-0.06768799,0.029586792,-0.0473938,-0.003414154,0.034057617,-0.036621094,0.003583908,-0.010635376,-0.023101807,-0.031311035,0.008460999,-0.015426636,-0.0075416565,0.016143799,-0.020980835,-0.012298584,-0.06274414,-0.019699097,-0.01876831,0.050628662,0.015151978,0.002538681,-0.07220459,0.0051956177,0.011756897,0.0048561096,0.020385742,-0.014640808,-0.0049057007,-0.006801605,-0.014892578,-0.008926392,-0.01927185,0.025299072,-0.0095825195,-0.0035686493,0.009994507,0.011543274,0.022125244,0.015655518,-0.0011396408,0.041412354,-0.005077362,-0.015670776,-0.0059013367,0.040130615,0.010475159,-0.026275635,-0.046813965,0.035125732,-0.007385254,0.042388916,-0.038360596,-0.008071899,-0.0063438416,0.012283325,0.0082092285,0.0012435913,0.003610611,-0.010673523,-0.04473877,-0.058288574,0.036468506,-0.023529053,0.033050537,0.03048706,0.00091171265,0.019851685,-0.01373291,0.017196655,0.012046814,-0.030334473,-0.024307251,-0.03149414,-0.037200928,-0.029754639,-0.007965088,-0.03253174,0.019088745,-0.016448975,0.0082473755,0.0013113022,-0.018035889,0.03768921,-0.0032367706,0.0032920837,0.009025574,-0.0021514893,0.017074585,0.022018433,0.010246277,-0.05557251,0.034484863,-0.001739502,0.005290985,-0.013969421,0.028625488,0.027893066,-0.014556885,0.009338379,-0.0065460205,-0.01789856,-0.015960693,-0.0012550354,-0.0076026917,0.008361816,0.0029659271,-0.059020996,0.019699097,0.0070228577,-0.03189087,-0.03262329,0.02796936,0.014877319,-0.027679443,0.018798828,0.03677368,0.04953003,-0.009963989,-0.0041007996,0.004486084,0.043518066,0.04650879,0.015533447,-0.007232666,0.026321411,0.00064229965,0.031677246,-0.009117126,-0.006046295,-0.00061035156,0.0049591064,0.02696228,0.021408081,0.0005645752,-0.0015277863,-0.04107666,-0.011947632,-0.0052833557,-0.025238037,0.024230957,0.011444092,0.023117065,-0.014022827,0.023422241,0.020309448,-0.021835327,-0.009765625,-0.00036859512,0.03881836,-0.0073394775,-0.017532349,0.005962372,0.022232056,0.027435303,-0.05935669,-0.010917664,0.0031909943,0.016311646,-0.010437012,-0.045837402,-0.03173828,-0.0020580292,0.03378296,0.009727478,0.013442993,0.037200928,0.005645752,0.0016460419,0.032287598,0.010116577,-0.010765076,0.0020809174,-0.039764404,-0.005973816,-0.0073928833,0.0054016113,-0.033050537,0.018920898,-0.007068634,-0.017242432,0.004989624,-0.032714844,0.0006942749,-0.012771606,0.01309967,0.02760315,-0.01675415,0.014656067,-0.015312195,-0.038848877,0.009483337,0.011009216,0.0018005371,-0.036834717,0.01940918,-0.010063171,-0.0031356812,-0.0006556511,0.0029678345,0.031799316,0.015457153,0.010536194,0.030197144,-0.043640137,0.047454834,-0.022521973,0.018615723,0.0036010742,-0.026504517,-0.016983032,-0.030639648,-0.01864624,0.037231445,-0.01210022,-0.007385254,-0.031097412,-0.04840088,-0.010757446,-0.057678223,0.020751953,0.03375244,0.040802002,-0.0209198,0.005420685,-0.021453857,0.008598328,0.0011024475,0.016479492,-0.02017212,0.03363037,0.015914917,0.020126343,-0.020645142,-0.020523071,-0.03466797,0.0016365051,-0.04776001,-0.046325684,-0.004875183,0.018203735,-0.004627228,-0.017440796,-0.035705566,-0.022705078,0.0042381287,-0.035339355,0.014793396,0.00035834312,0.022659302,-0.0016288757,-0.008033752,0.008918762,0.014678955,-0.012168884,0.032989502,0.021911621,-0.00096178055,-0.033050537,0.025894165,0.02319336,0.017150879,-0.022369385,-0.012809753,0.005405426,-0.026992798,-0.054138184,0.01399231,0.0005207062,-0.013442993,-0.01638794,0.014350891,-0.047454834,0.0023670197,-0.03845215,-0.00856781,0.019821167,0.011764526,0.01222229,0.0030994415,0.0049591064,0.0040130615,-0.012481689,-0.04345703,0.01966858,0.010925293,0.0012187958,0.013435364,0.061645508,0.0073661804,-0.027069092,0.0026340485,-0.016540527,0.016906738,-0.018859863,0.019088745,-0.009857178,0.00831604,-0.007247925,-0.013931274,-0.04196167,0.0043258667,0.07727051,0.00434494,-0.017105103,-0.013549805,-0.009757996,0.018600464,0.032989502,-0.025161743,0.010345459,-0.02015686,0.018035889,-0.03466797,0.0027370453,0.00027799606,0.040496826,-0.0154953,-0.057556152,-0.017044067,-0.022003174,-0.007419586,-0.05645752,-0.026550293,-0.04525757,-0.002521515,0.0035152435,-0.022262573,0.0052604675,0.01751709,-0.028808594,-0.09173584,0.010063171,0.03894043,-0.00046157837,0.02949524,-0.0024967194,0.02116394,0.024810791,-0.028198242,-0.021591187,0.020645142,-0.02204895,0.0018262863,-0.035186768,0.028274536,-0.0042152405,-0.012451172,0.0073013306,0.0048294067,0.014038086,-0.005432129,-0.006023407,-0.021636963,0.00957489,-0.014511108,0.018463135,-0.013252258,-0.018585205,0.030303955,-0.055236816,0.029067993,0.014427185,-0.0051879883,0.007331848,0.03933716,0.035583496,-0.034362793,-0.001159668,0.011856079,0.017822266,0.056610107,-0.022109985,0.032714844,0.015716553,-0.004142761,0.009941101,-0.00010615587,-0.0041542053,-0.026565552,-0.012496948,0.028167725,0.0037326813,-0.0036792755,-0.017349243,0.0030021667,0.01058197,0.01789856,0.004306793,-0.0041885376,-0.032958984,-0.03475952,-0.0039596558,0.014183044,-0.0047683716,-0.0077934265,0.020614624,0.0413208,0.042999268,0.016433716,-0.013259888,0.0063095093,0.038085938,-0.013397217,-0.0127334595,0.022949219,0.005207062,0.02078247,0.012016296,0.009399414,-0.037872314,-0.020431519,-0.01991272,-0.01889038,0.005924225,-0.0060653687,0.0013580322,0.0028018951,0.0057525635,-0.00066280365,-0.025421143,0.007259369,-0.03173828,-0.039886475,-0.006324768,-0.013092041,0.02709961,0.0002641678,-0.0043754578,0.023666382,-0.0040359497,0.039855957,0.0058784485,-0.018737793,0.03552246,0.03765869,0.013015747,-0.0181427,0.0057792664,-0.011116028,-0.008010864,-0.004673004,-0.040222168,0.026168823,0.016921997,-0.0087509155,0.011009216,-0.0058288574,0.02508545,-0.021026611,-0.0000121593475,-0.017913818,0.01939392,-0.008842468,0.0579834,-0.04449463,0.030776978,0.0149383545,0.00283432,0.0015277863,0.0042266846,-0.034179688,0.014060974,0.0054473877,-0.011894226,0.038391113,0.0044898987,0.043395996,-0.02709961,-0.020553589,-0.00699234,-0.027435303,-0.035308838,0.016052246,-0.0132369995,-0.0074920654,0.015914917,-0.028411865,0.033172607,-0.019439697,0.018127441,-0.011764526,-0.0009803772,-0.012588501,-0.0037708282,-0.018035889,-0.0178833,-0.018615723,0.01184845,-0.005405426,0.0597229,0.007091522,0.026901245,0.0440979,0.01625061,-0.0029773712,-0.038085938,-0.032165527,0.00187397,-0.0034885406,0.0074768066,-0.015991211,0.04928589,0.041259766,-0.0030727386,0.037841797,0.024597168,0.025527954,-0.0021953583,0.017303467,-0.018096924,0.011497498,-0.009963989,0.03149414,-0.0079193115,0.04421997,-0.029251099,0.03933716,0.016845703,0.02154541,-0.022720337,0.027862549,0.0725708,0.009819031,-0.024017334,0.031982422,-0.0016717911,-0.021438599,-0.017959595,-0.025390625,0.04876709,0.00894928,0.038909912,0.061706543,0.017562866,0.004753113,0.016494751,-0.020111084,-0.011962891,0.06506348,0.02696228,-0.0037117004,-0.01763916,-0.0007529259,0.011917114,-0.035705566,-0.019805908,0.009155273,-0.03503418,-0.0020637512,0.00491333,-0.0012159348,-0.0069007874,0.012008667,0.015113831,0.029144287,-0.020355225,0.032287598,0.028747559,-0.005382538,0.016555786,-0.00032019615,0.019180298,-0.031951904,-0.025405884,0.017486572,0.029510498,-0.017532349,-0.019546509,0.023269653,0.00868988,0.049102783,0.043792725,-0.029403687,0.006324768,0.037597656,0.00049591064,-0.0053634644,0.05618286,0.032592773,0.0074653625,0.047210693,0.02508545,0.034851074,-0.039855957,0.019866943,0.0050468445,-0.00033807755,-0.02532959,-0.00026631355,0.009124756,-0.018539429,0.0440979,-0.0084991455,-0.008377075,0.011398315,0.031311035,-0.005493164,-0.008476257,-0.015670776,-0.00016736984,-0.02519226,-0.011222839,0.019836426,-0.016281128,0.022659302,-0.0011377335,0.03265381,-0.043273926,0.018371582,-0.000910759,-0.026107788,-0.010765076,0.018600464,-0.04421997,0.007183075,-0.0047035217,-0.0082092285,-0.047790527,0.0073661804,0.02746582,-0.009132385,0.02609253,0.005077362,0.000313282,0.0011730194,0.030197144,0.01576233,0.00242424,-0.011100769,-0.024093628,0.020751953,0.04071045,0.016342163,-0.0041770935,-0.01121521,-0.00374794,0.004463196,-0.012649536,-0.007549286,-0.00472641,-0.027328491,-0.018463135,0.01360321,0.036468506,0.008522034,0.055511475,-0.022659302,-0.010299683,0.011329651,0.037597656,-0.0039787292,-0.021820068,-0.0104522705,0.012893677,-0.022369385,0.047912598,0.034454346,-0.0010242462,0.037750244,-0.0017309189,-0.019561768,0.0031719208,-0.0027866364,0.029434204,-0.010444641,-0.0027103424,-0.0023384094,0.028457642,-0.009765625,-0.02192688,-0.002822876,-0.024017334,-0.016220093,-0.012207031,0.016174316,-0.001625061,0.031143188,0.04196167,0.016281128,-0.020812988,0.05899048,-0.02243042,0.04458618,0.007904053,-0.02217102,0.04953003,0.02909851,0.047454834,0.012908936,0.023910522,-0.030853271,0.028259277,0.03704834,0.018539429,0.004486084,0.004333496,-0.012527466,0.034301758,0.0013637543,0.029312134,-0.0071144104,-0.011398315,0.01727295,-0.011329651,-0.0087509155,-0.0005097389,-0.014701843,-0.009788513,0.049804688,-0.0362854,-0.007801056,-0.027023315,-0.0070228577,0.029281616,-0.01864624,-0.003129959,0.002872467,-0.019714355,0.016601562,-0.009757996,-0.011016846,0.015960693,0.030349731,-0.04711914,-0.0023727417,0.015464783,0.0022830963,-0.008560181,0.029388428,0.032409668,0.0014104843,-0.0022964478,0.04067993,-0.022109985,0.039398193,-0.008117676,0.02218628,0.011520386,0.0088272095,-0.012557983,0.0020313263,0.008926392,-0.012123108,0.013420105,0.034118652,-0.02319336,0.0016851425,-0.0025558472,-0.008270264,-0.00046682358,-0.006828308,-0.014770508,0.009590149,-0.015533447,-0.014793396,0.007926941,0.0040130615,-0.0002322197,0.009284973,0.011802673,0.0014381409,0.013420105,0.030090332,0.022888184,-0.041778564,-0.00032544136,0.0075950623,0.009963989,-0.029693604,-0.020706177,0.00022828579,-0.037200928,0.00881958,0.01109314,0.011100769,0.011253357,-0.009155273,-0.005077362,0.019454956,0.011924744,0.015602112,-0.006000519,0.011314392,0.018081665,-0.030593872,0.0075645447,-0.0047721863,-0.007347107,0.018035889,0.019851685,-0.012207031,-0.02998352,0.021148682,-0.009117126,0.017684937,-0.0072288513,0.00422287,0.026550293,-0.00497818,-0.004627228,0.0012044907,0.022033691,-0.014915466,-0.008720398,-0.0059547424,0.026168823,0.057922363,-0.00642395,-0.0007133484,0.0231781,0.017166138,0.01889038,0.03338623,0.0076942444,0.05001831,0.0259552,-0.021392822,-0.009613037,0.017959595,-0.010299683,-0.030670166,0.015945435,-0.026535034,-0.012756348,-0.0030403137,0.020629883,-0.0073013306,-0.032165527,-0.015113831,-0.010665894,-0.008056641,0.023834229,-0.014427185,0.019714355,-0.02078247,-0.006340027,0.021759033,-0.02368164,-0.03866577,-0.029220581,-0.011672974,-0.008628845,-0.050567627,0.012893677,-0.038757324,0.014717102,-0.009170532,-0.003145218,-0.0060424805,0.012260437,0.0030574799,-0.022033691,0.0060310364,0.028366089,0.017944336,0.010169983,0.02406311,-0.0345459,-0.018234253,-0.026275635,0.0010652542,-0.020584106,0.037078857,0.0030288696,0.029464722,0.019348145,-0.03265381,-0.004840851,-0.017059326,-0.009635925,-0.009628296,-0.013786316,-0.019638062,0.017562866,0.009162903,0.0146102905,-0.009613037,0.04269409,-0.027862549,-0.00982666,0.022994995,0.03656006,0.00026655197,0.03665161,-0.0206604,0.00094127655,-0.023391724,0.0025234222,-0.014083862,0.0076293945,-0.00021457672,0.017684937,-0.0053100586,0.01928711,0.014755249,-0.009521484,0.0010385513,0.029754639,0.008415222,0.0030899048,0.029800415,0.012428284,0.015701294,-0.009048462,-0.007980347,0.0002977848,0.04095459,0.02532959,-0.0048065186,-0.011154175,0.015060425,-0.026428223,0.0035972595,0.02017212,-0.018661499,-0.03970337,-0.015075684,-0.035827637,0.014701843,-0.0013275146,0.014038086,-0.015258789,0.019989014,-0.01802063,-0.029693604,-0.017089844,0.03213501,0.02154541,-0.018157959,-0.013809204,0.0020885468,0.013771057,-0.028366089,-0.006084442,-0.045562744,-0.051818848,0.0033073425,-0.016159058,0.030807495,0.006893158,-0.0129470825,-0.01146698,-0.013244629,-0.012428284,0.014190674,0.019714355,-0.01083374,-0.0058403015,0.022750854,0.03100586,-0.011100769,0.028778076,-0.008171082,0.014190674,0.015716553,-0.007183075,0.021331787,-0.014221191,0.025863647,-0.010520935,0.0049324036,0.025512695,0.0015792847,0.011444092,-0.04611206,0.0035686493,0.00067186356,-0.006591797,0.03805542,-0.012710571,-0.027282715,-0.0037784576,-0.02293396,-0.026947021,0.001709938,0.008331299,0.02571106,0.00091409683,0.038208008,-0.011405945,-0.018920898,0.01965332,0.013175964,-0.012008667,0.012054443,0.024902344,-0.005455017,-0.0012521744,-0.0028038025,-0.017318726,-0.008995056,-0.00843811,0.0045661926,-0.010787964,-0.010116577,0.015457153,0.015060425,0.037353516,0.004924774,0.020751953,0.0011749268,0.012062073,0.03213501,0.00019812584,0.03744507,-0.012374878,-0.026000977,0.0026168823,0.0019741058,-0.034820557,0.015167236,-0.00045752525,0.002412796,-0.039611816,0.0044898987,0.011955261,0.030227661,-0.012168884,0.019699097,-0.012191772,-0.0065307617,-0.022735596,-0.0045318604,-0.02911377,0.017089844,0.02583313,0.0032081604,0.029876709,0.0019626617,-0.020553589,0.009963989,0.035461426,-0.0070762634,-0.022262573,-0.018920898,0.0113220215,-0.0071868896,0.004940033,0.010307312,-0.026168823,-0.022369385,0.0061683655,-0.0119018555,-0.011039734,-0.009963989,0.011062622,0.001376152,-0.0053367615,-0.013076782,0.02508545,-0.003955841,-0.014846802,0.0016202927,0.007987976,0.03074646,0.03074646,-0.00894165,0.004085541,0.02557373,-0.03286743,0.07080078,-0.010696411,0.01977539,-0.016403198,-0.0025157928,-0.051879883,-0.02192688,-0.013549805,-0.008491516],"createdAt":"2026-04-18T18:58:22.557Z","updatedAt":"2026-04-25T01:32:59.742Z","lastSeenAt":"2026-04-25T01:32:59.742Z","tsv":"'/api':156 '/api/v1/transactions/1/receipt':90 '/docs':154 '/pricing':155 '/readme':158 '0.02':14,30,76,112 '000':101 '0x8335':106 '16':209 '20':100 '2913':107 '402':93,193 '6':110 'Base network API' 'USDC micropayment API' 'access':44,135 'across':211 'actual':198 'advertis':133 'ai':64 'analyt':63 'api':43,60,125 'avail':185 'base':9,25,84,102,109 'base-network' 'broader':56,206 'call':4,20,114 'categori':61,213 'challeng':96,194 'commit':148 'confirm':195 'connect':164 'crawl':188 'crypto payment endpoint' 'data':62,199 'decim':111 'detail':171 'document':149,180,217 'enabl':36 'endpoint':7,23,37,89,190,210 'exact':121 'exampl':184 'extrem':151 'financ':67 'four':212 'infrastructur':70 'instant':134 'key':126 'learn':66 'limit':129 'list':208 'live':192 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':65 'made':117 'minimum':146 'model':143 'multipl':59 'network':85 'no-api-key' 'none':215 'offer':58 'openapi':175 'page':159 'part':53 'pay':2,18,140 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request API' 'pay-per-us':139 'payment':94,115,202 'per':3,19,77,113,141 'platform':57,132,207 'post':49 'premium':42 'price':12,28,73 'probe':88 'prompt':166 'provid':40 'rate':128 'receipt':6,22,46 'render':161 'request':50,78,97 'request/response':178 'requir':95,130 'respons':221 'return':91,200 'sampl':220 'schema':179,218 'scheme':122 'settl':79 'simpl':138 'spars':152 'spec':176 'specif':87 'technic':170 'transact':5,21,45 'transaction receipt API' 'transaction-receipt' 'uniform':74 'unit':103 'unknown':204 'usag':183 'usdc':16,32,81,105 'usdc-settlement' 'use':142 'util':71 'via':10,26,47,118 'wallet':165 'web3':68 'x402':11,27,35,120 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"63218627-51cb-4bc5-bb88-6f7f0b7734f2","listingId":"1648b0cf-bce7-4a0d-be91-9511311b2d47","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/transactions/1/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:22.557Z"}],"sources":[{"listingId":"1648b0cf-bce7-4a0d-be91-9511311b2d47","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/1/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:22.557Z","lastSeenAt":"2026-04-25T01:32:59.742Z"}],"details":{"listingId":"1648b0cf-bce7-4a0d-be91-9511311b2d47","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/1/receipt \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","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 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/1/receipt"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/1/receipt"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform lists 16 endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving transaction receipts on a per-call payment basis","Demonstrating x402 payment protocol integration","Agent-driven API consumption without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access on Base","Low-volume, on-demand transaction receipt retrieval"],"notFor":["Production workloads requiring documented request/response schemas","High-volume batch processing where per-call pricing is inefficient","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.269Z"},"updatedAt":"2026-04-25T01:32:59.742Z"}}