{"id":"1dc4bc02-ef11-499d-964c-8742e1aead10","shortId":"6cKKE3","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt retrieval API gated by the x402 payment protocol. When called via POST, it returns a JSON receipt for a given transaction (identified by ID in the URL path). Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (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 with no API keys, no rate limits, and no minimum commitments.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, 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 specific endpoint probed (/api/v1/transactions/123/receipt) is live and returns a valid x402 402 challenge, but its actual response payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment API","USDC micropayment endpoint","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all render only 'Connect wallet'","No OpenAPI or schema definition found; request and response formats are unknown","The specific endpoint path includes a hardcoded transaction ID (123), suggesting it may be a demo or placeholder","The platform lists many endpoints (AI, finance, utils) but none have documented schemas or verifiable functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/123/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/123/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The actual functionality behind the receipt endpoint is unverifiable beyond the challenge metadata.","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":"2026-04-19T12:03:49.533Z","embedding":[-0.028869629,-0.036987305,0.030151367,0.0064201355,-0.0071868896,-0.020080566,-0.0075531006,0.017440796,0.0625,-0.06915283,0.022399902,-0.04763794,-0.029968262,-0.029159546,-0.024475098,0.0052452087,0.012626648,0.030258179,-0.034942627,0.017486572,0.024108887,-0.039154053,-0.027801514,0.017303467,-0.0009551048,-0.024398804,-0.022735596,-0.0076293945,-0.03756714,-0.030517578,0.058776855,-0.021133423,-0.01966858,0.008354187,-0.017990112,0.008514404,-0.0072364807,0.0024852753,0.034606934,-0.023071289,-0.021743774,-0.03289795,0.008255005,-0.018096924,-0.04550171,0.0154800415,-0.0006713867,-0.012107849,0.026779175,-0.008331299,-0.060943604,-0.015457153,0.013328552,0.0256958,-0.0012187958,0.0070152283,0.0035381317,0.0033226013,0.017211914,0.015274048,-0.00630188,-0.06573486,-0.006084442,-0.0259552,0.0070495605,0.05722046,-0.018936157,0.056793213,0.017562866,0.0713501,0.032928467,0.04550171,0.028656006,0.0046577454,0.01637268,-0.0040626526,0.002752304,0.043701172,-0.03451538,-0.03656006,0.002035141,-0.02494812,-0.07421875,-0.004901886,-0.009384155,-0.044891357,-0.022567749,0.009117126,-0.011207581,0.032989502,-0.07324219,-0.0004274845,0.01537323,0.025650024,0.013679504,-0.03375244,-0.020736694,0.0084991455,-0.0065231323,0.008544922,-0.00016117096,-0.040039062,0.042541504,-0.003604889,0.038513184,0.042114258,-0.0029144287,0.01713562,0.013221741,0.018493652,-0.020996094,0.026260376,0.015670776,-0.023040771,0.012771606,-0.0022735596,-0.028930664,0.013557434,-0.035705566,0.025787354,-0.041137695,0.05911255,-0.0017004013,0.00018048286,0.008018494,-0.04611206,-0.033172607,0.016311646,-0.017791748,0.0056991577,0.03387451,0.014175415,0.013198853,-0.020141602,-0.030670166,0.007434845,-0.013092041,-0.027023315,-0.031097412,-0.036193848,0.033111572,-0.03338623,-0.0028877258,0.038208008,-0.07397461,0.011894226,-0.05307007,-0.0025596619,-0.014671326,-0.017593384,0.0023860931,0.007881165,-0.019683838,-0.005142212,-0.013954163,-0.018203735,0.0056419373,0.0413208,-0.00995636,0.035339355,-0.020126343,0.034332275,0.03857422,0.017669678,0.011123657,0.012107849,0.0027256012,-0.06222534,-0.07952881,0.004878998,0.0033607483,-0.026779175,-0.041534424,0.008842468,-0.032104492,-0.07751465,-0.01083374,0.012664795,-0.0031337738,-0.028656006,-0.008682251,-0.03074646,0.013877869,-0.033233643,-0.0395813,-0.034942627,-0.030914307,0.0703125,0.023025513,0.038391113,0.01689148,-0.004688263,0.03427124,0.032928467,-0.0003809929,-0.0068969727,0.012512207,-0.029891968,0.010528564,-0.0016403198,0.0031871796,-0.025726318,0.018844604,0.076538086,-0.013824463,-0.05331421,-0.013465881,-0.04916382,-0.0231781,-0.010574341,0.02330017,0.005493164,-0.018569946,0.04498291,-0.05038452,0.004020691,0.025482178,0.0284729,0.0006661415,0.060668945,0.025543213,-0.013442993,0.033691406,0.022247314,-0.04168701,0.048828125,0.023666382,0.0045547485,-0.02784729,-0.05529785,0.019989014,0.044281006,-0.022506714,0.009681702,-0.01374054,0.03994751,-0.010101318,-0.009086609,0.030929565,-0.009941101,-0.032440186,-0.015510559,-0.0154418945,0.030151367,0.0049858093,-0.019622803,-0.04260254,-0.0769043,0.07324219,0.026809692,0.0256958,-0.0065193176,0.012931824,-0.017044067,-0.02180481,-0.07800293,0.055541992,0.045532227,-0.0088272095,-0.026565552,0.049804688,-0.01612854,-0.031463623,0.013519287,-0.019226074,-0.034240723,-0.036254883,-0.004146576,-0.051330566,0.02407837,-0.009170532,0.0073928833,0.059692383,0.020843506,-0.044952393,-0.010925293,-0.034851074,-0.0018701553,-0.01902771,-0.0028095245,-0.012382507,0.01222229,0.0112838745,-0.0016231537,-0.002412796,0.017807007,-0.01977539,-0.019607544,0.012283325,0.0009202957,-0.026382446,0.023345947,-0.0099487305,-0.05355835,-0.0042495728,-0.009216309,0.06982422,-0.068725586,0.036346436,-0.019760132,-0.0050582886,0.06781006,-0.019943237,-0.049682617,0.014015198,0.022109985,0.0019397736,0.008857727,0.019638062,-0.014503479,-0.027511597,0.05178833,-0.021026611,-0.013427734,0.011817932,0.020462036,0.040985107,-0.015365601,-0.057434082,-0.040527344,0.021972656,-0.033416748,0.02104187,-0.00920105,0.03878784,-0.01524353,-0.0035381317,-0.032989502,0.0057678223,-0.00073194504,0.019851685,-0.01701355,0.0035953522,-0.0118637085,-0.023208618,0.04550171,0.012031555,-0.014945984,0.008621216,0.06060791,0.0155181885,-0.016326904,-0.024002075,-0.028640747,-0.019927979,-0.019882202,0.02255249,0.015602112,0.021255493,0.044525146,-0.020126343,0.017593384,0.029083252,0.00049066544,0.026473999,0.008094788,-0.004108429,-0.08947754,-0.023727417,-0.018875122,-0.052612305,0.031173706,0.023162842,0.0024528503,0.06402588,0.014801025,-0.039245605,-0.034423828,0.026519775,-0.04623413,0.011985779,0.050994873,-0.027694702,0.0038871765,-0.018753052,-0.009742737,0.008773804,0.04208374,0.026382446,0.028793335,0.064941406,0.031143188,-0.0010766983,0.014266968,0.0076828003,0.025939941,0.009552002,-0.011383057,-0.023895264,-0.023483276,0.022125244,-0.03479004,-0.020889282,-0.04647827,0.05606079,0.04525757,0.061828613,0.020111084,0.019897461,0.028305054,0.024871826,0.01776123,-0.0048713684,-0.01802063,-0.041290283,-0.027297974,0.033691406,-0.014816284,0.0034389496,-0.0069885254,0.026473999,0.0033283234,0.014160156,-0.02633667,0.028839111,-0.026260376,-0.0011100769,0.038116455,0.035614014,0.0446167,0.05456543,-0.02696228,0.01474762,0.02532959,-0.04827881,0.030075073,0.026229858,-0.026184082,0.0023727417,-0.049804688,-0.03527832,0.0075531006,-0.010360718,-0.03744507,-0.0018568039,0.005077362,0.025009155,0.026855469,-0.024414062,-0.033447266,0.0011844635,-0.012786865,-0.037139893,0.000098109245,-0.049316406,0.010070801,0.020217896,-0.033843994,0.042236328,0.0036506653,0.005947113,-0.031707764,0.014373779,0.029968262,-0.0051956177,-0.030838013,0.034057617,0.014137268,-0.004776001,0.002407074,0.036499023,0.015975952,0.048065186,0.03805542,0.014122009,-0.01259613,-0.07067871,0.037200928,-0.045135498,-0.00087213516,0.03741455,-0.04525757,0.0024681091,-0.007335663,-0.031173706,-0.014381409,0.005004883,-0.031204224,-0.005783081,0.0184021,-0.018554688,-0.014801025,-0.060668945,-0.022583008,-0.010643005,0.041900635,-0.008560181,0.018676758,-0.07098389,0.011688232,0.021255493,0.007472992,0.01838684,-0.0146865845,-0.022155762,-0.012489319,-0.021636963,-0.012557983,-0.009384155,0.02003479,-0.0021953583,-0.010368347,0.013404846,0.012313843,0.027938843,0.024398804,0.0040397644,0.021392822,-0.0032520294,-0.016357422,0.021560669,0.04534912,0.0178833,-0.041625977,-0.03778076,0.044555664,-0.010353088,0.03314209,-0.0501709,-0.016586304,-0.011016846,0.012756348,0.009780884,-0.0056419373,-0.0024089813,0.0014381409,-0.03427124,-0.042907715,0.030700684,-0.015625,0.040924072,0.036987305,0.0071525574,0.015777588,-0.0060920715,0.028030396,0.001698494,-0.038208008,-0.030807495,-0.03125,-0.037872314,-0.03189087,-0.0062561035,-0.024261475,0.020629883,-0.023162842,0.014831543,0.004890442,-0.016235352,0.04537964,-0.0044059753,0.006839752,0.0077400208,-0.0056648254,0.016082764,0.021896362,0.024002075,-0.055389404,0.025421143,-0.002281189,0.0031223297,-0.009986877,0.022750854,0.027114868,-0.032104492,0.010375977,-0.015258789,0.0038108826,-0.020828247,-0.0028572083,-0.009391785,0.00484848,-0.006729126,-0.06365967,0.011878967,0.008110046,-0.034301758,-0.041992188,0.02432251,0.019104004,-0.03213501,0.019348145,0.033203125,0.035736084,-0.013084412,0.0031394958,0.0035991669,0.0385437,0.051879883,0.0046691895,0.0010356903,0.032989502,-0.00920105,0.028015137,-0.0017518997,-0.0022907257,0.0037326813,0.010887146,0.028457642,0.022872925,-0.0040397644,0.0053253174,-0.047058105,-0.003850937,0.00630188,-0.02709961,0.035064697,0.010063171,0.025543213,-0.008178711,0.019836426,0.015602112,-0.01499939,-0.016403198,0.019454956,0.032440186,-0.012649536,-0.023849487,0.015022278,0.016525269,0.03189087,-0.06378174,-0.006664276,-0.007507324,0.017669678,-0.008171082,-0.038146973,-0.025299072,-0.015602112,0.047332764,0.011489868,0.020004272,0.03567505,0.0066108704,-0.0064086914,0.022445679,0.01651001,-0.008834839,-0.0034561157,-0.051513672,-0.012046814,-0.012771606,0.0055160522,-0.046813965,0.025161743,-0.0026855469,-0.01461792,0.0044937134,-0.036376953,0.003944397,-0.020309448,-0.0008378029,0.031341553,-0.0053520203,0.012626648,-0.0063285828,-0.04257202,0.0046310425,0.010467529,0.0072517395,-0.040161133,0.018859863,-0.012130737,0.003320694,-0.0039634705,0.0042419434,0.026473999,0.01928711,0.0068473816,0.02784729,-0.050628662,0.0463562,-0.022201538,0.023269653,0.010002136,-0.022415161,-0.021102905,-0.029266357,-0.007171631,0.031677246,-0.016860962,-0.009338379,-0.037750244,-0.05899048,-0.022247314,-0.059265137,0.015808105,0.02394104,0.044769287,-0.013824463,0.0049476624,-0.022094727,0.008605957,-0.0039634705,0.003540039,-0.010673523,0.034820557,0.015510559,0.016555786,-0.0126953125,-0.0284729,-0.03527832,-0.0039634705,-0.052947998,-0.04949951,-0.0023784637,0.0154800415,-0.0014677048,-0.015014648,-0.04058838,-0.0154953,-0.0020389557,-0.029296875,0.01675415,-0.00793457,0.023880005,-0.001461029,0.0009627342,0.0065307617,0.011199951,-0.011695862,0.049041748,0.023284912,-0.0013513565,-0.035491943,0.027145386,0.004886627,0.002281189,-0.018753052,-0.015853882,-0.005809784,-0.017120361,-0.04498291,0.00831604,0.011619568,-0.016113281,-0.026382446,0.00869751,-0.042785645,0.0015287399,-0.044952393,-0.0063438416,0.007965088,0.009155273,0.004600525,-0.0049209595,0.014839172,-0.0009331703,-0.0017213821,-0.04345703,0.03161621,0.010421753,0.006755829,0.02003479,0.057128906,0.006931305,-0.029632568,-0.0016145706,-0.013137817,0.0021858215,-0.018356323,0.03378296,-0.0051460266,0.013244629,0.00005942583,-0.015853882,-0.039764404,0.010612488,0.06542969,-0.00060892105,-0.02104187,-0.020263672,-0.0032100677,0.021972656,0.030181885,-0.023880005,0.0031013489,-0.021591187,0.015426636,-0.03289795,0.0046653748,-0.010276794,0.028244019,-0.012382507,-0.05166626,-0.0032978058,-0.03253174,-0.012580872,-0.062683105,-0.020629883,-0.055908203,0.01939392,0.008972168,-0.030258179,0.0062828064,0.027832031,-0.0154418945,-0.08325195,0.016662598,0.031219482,0.0049972534,0.034973145,0.014778137,0.022659302,0.024398804,-0.026748657,-0.022521973,0.009712219,-0.024276733,-0.0055770874,-0.029022217,0.015457153,-0.014968872,-0.009712219,0.012504578,0.004486084,0.013084412,-0.005897522,-0.008056641,-0.020812988,0.0056419373,-0.0104904175,0.02557373,-0.016906738,-0.006904602,0.045288086,-0.056396484,0.036224365,0.018234253,0.003189087,0.009864807,0.03010559,0.049682617,-0.03152466,0.010429382,0.007209778,0.022949219,0.06878662,-0.024490356,0.020401001,0.02204895,0.0035896301,0.0004503727,-0.0011062622,-0.0026855469,-0.029449463,-0.002149582,0.02923584,-0.0050086975,-0.004825592,-0.031021118,0.009002686,0.014015198,0.019470215,0.00077295303,-0.008964539,-0.028427124,-0.045837402,0.00069999695,-0.00022923946,-0.00044488907,-0.011016846,0.0184021,0.03564453,0.035827637,0.019561768,-0.013023376,0.00724411,0.03665161,-0.0028457642,-0.01612854,0.033050537,0.0035934448,0.014099121,0.019134521,0.006942749,-0.032043457,-0.025939941,-0.020751953,-0.017425537,0.0030765533,-0.010765076,-0.006336212,0.0051231384,0.007926941,-0.008331299,-0.014709473,0.007709503,-0.026992798,-0.03717041,-0.016113281,-0.01008606,0.04220581,-0.003534317,-0.00021779537,0.022445679,-0.006099701,0.055664062,0.015090942,-0.018966675,0.020004272,0.03955078,0.024215698,-0.017349243,-0.0047798157,-0.0143966675,-0.0038795471,-0.010948181,-0.034240723,0.03387451,0.01134491,-0.011703491,-0.003458023,0.003742218,0.01763916,-0.01361084,0.0034255981,-0.012268066,0.013969421,-0.0023212433,0.06262207,-0.046722412,0.037902832,0.014503479,-0.0048713684,-0.0010566711,0.0011749268,-0.03036499,0.02015686,0.006565094,-0.0030403137,0.03479004,0.003730774,0.034118652,-0.019760132,-0.018630981,0.0018196106,-0.008354187,-0.026931763,-0.00027894974,-0.008880615,-0.019134521,0.0030899048,-0.013626099,0.032409668,-0.0178833,0.011680603,-0.012611389,-0.007904053,-0.011054993,-0.021484375,-0.015350342,-0.00970459,-0.009262085,0.0045776367,-0.0014343262,0.059326172,0.0071640015,0.03375244,0.045532227,0.029708862,0.0063667297,-0.03390503,-0.029449463,-0.002008438,0.003479004,0.0075645447,-0.016647339,0.048919678,0.058685303,-0.0033092499,0.033172607,0.015281677,0.02835083,0.001991272,0.010574341,-0.00982666,0.012252808,-0.011245728,0.027435303,-0.013282776,0.03439331,-0.022476196,0.02798462,0.019500732,0.032226562,-0.020385742,0.024551392,0.07879639,0.0008802414,-0.012512207,0.014007568,0.0025196075,-0.02949524,-0.016555786,-0.02658081,0.050598145,0.01461792,0.028823853,0.06427002,0.020706177,0.016860962,0.00957489,-0.01777649,-0.0023384094,0.06286621,0.015151978,-0.0021152496,-0.020126343,-0.012359619,0.015975952,-0.028839111,-0.015335083,-0.0006542206,-0.042419434,0.005542755,-0.0042304993,-0.004425049,-0.008659363,0.014472961,0.014305115,0.02407837,-0.019577026,0.018096924,0.020828247,-0.010238647,0.018127441,-0.013114929,0.02444458,-0.028656006,-0.026809692,0.021331787,0.021270752,-0.014472961,-0.031219482,0.028564453,0.008392334,0.04559326,0.050231934,-0.025161743,0.0096588135,0.03366089,0.0062828064,-0.0109939575,0.05331421,0.027938843,0.014907837,0.046051025,0.02798462,0.039001465,-0.024307251,0.028274536,-0.004043579,-0.008422852,-0.012786865,0.0070762634,0.0076675415,-0.02128601,0.0463562,-0.011581421,-0.013153076,0.01285553,0.030807495,-0.0062408447,-0.006088257,-0.019958496,-0.00299263,-0.021942139,-0.006702423,0.033691406,-0.007835388,0.023925781,0.004753113,0.035247803,-0.036956787,0.020690918,-0.008514404,-0.032836914,-0.020065308,0.015419006,-0.027618408,0.0075912476,-0.010040283,-0.010246277,-0.049682617,0.016921997,0.018981934,-0.02017212,0.028640747,0.0023384094,0.00070524216,-0.004863739,0.029373169,0.003873825,0.00630188,-0.00541687,-0.014434814,0.017166138,0.04522705,0.013511658,-0.0073242188,-0.0112838745,-0.0060157776,-0.001824379,-0.004840851,-0.01675415,-0.005317688,-0.022720337,-0.013938904,0.014564514,0.024124146,0.0039787292,0.05581665,-0.024505615,-0.011619568,0.013954163,0.03527832,-0.0058174133,-0.025314331,-0.008911133,0.016403198,-0.024475098,0.038909912,0.036956787,0.00315094,0.02973938,0.00022494793,-0.004562378,-0.002626419,0.0007805824,0.026885986,-0.011116028,0.006549835,-0.00035119057,0.024398804,-0.021865845,-0.034698486,0.00028324127,-0.016403198,-0.020477295,-0.010795593,0.0061073303,-0.0085372925,0.030151367,0.033294678,0.012329102,-0.030563354,0.056640625,-0.022094727,0.044189453,0.009742737,-0.01966858,0.052642822,0.028121948,0.041137695,0.01159668,0.026779175,-0.032989502,0.034576416,0.03894043,0.016540527,0.012077332,0.010650635,-0.011734009,0.035705566,-0.0053596497,0.032714844,-0.008850098,-0.009353638,0.027664185,-0.0020599365,-0.014556885,0.0033054352,-0.008018494,-0.002937317,0.041900635,-0.029678345,-0.008117676,-0.026535034,-0.0146865845,0.024398804,-0.015625,-0.0075302124,0.002960205,-0.01423645,0.006877899,-0.012901306,-0.0067214966,0.0099487305,0.034606934,-0.04257202,0.009246826,0.0143966675,-0.0032405853,-0.0011768341,0.022583008,0.03866577,0.0077590942,-0.003396988,0.036376953,-0.020477295,0.045074463,-0.0057868958,0.018112183,0.021209717,0.005924225,-0.021118164,0.006549835,0.0009803772,-0.009384155,0.011161804,0.04260254,-0.03036499,0.00242424,-0.0019483566,-0.0012540817,-0.008865356,-0.013320923,-0.012542725,0.0046920776,-0.011260986,-0.028427124,0.00091457367,0.0034484863,-0.0030918121,0.0047798157,0.0107421875,-0.00004118681,0.016845703,0.01940918,0.03793335,-0.044799805,-0.0039787292,0.011222839,0.003435135,-0.010810852,-0.026275635,-0.006450653,-0.041107178,0.0041999817,0.007007599,0.01083374,0.018127441,-0.007911682,0.00034999847,0.013519287,0.007881165,0.019744873,-0.0059165955,0.0021400452,0.018692017,-0.028305054,-0.00466156,-0.010932922,-0.010787964,0.016403198,0.026519775,-0.010635376,-0.024597168,0.015052795,-0.014472961,0.022857666,-0.007850647,0.01473999,0.03036499,-0.0023040771,-0.000749588,0.000049889088,0.022766113,-0.015945435,-0.020690918,0.0042304993,0.017486572,0.054870605,-0.0067214966,0.008415222,0.018844604,0.011512756,0.018005371,0.034820557,0.02230835,0.041259766,0.02330017,-0.020614624,-0.003967285,0.016281128,-0.007080078,-0.021591187,0.012878418,-0.034423828,-0.016952515,-0.005783081,0.0071640015,-0.0037326813,-0.023376465,-0.007610321,-0.0057144165,-0.009971619,0.016937256,-0.008560181,0.02267456,-0.014694214,-0.0036964417,0.014595032,-0.03479004,-0.03778076,-0.026779175,-0.023651123,-0.0070495605,-0.059265137,0.0102005005,-0.03665161,0.01612854,-0.02420044,-0.0034332275,0.0009908676,0.010261536,0.008964539,-0.019180298,-0.0020427704,0.034179688,0.020843506,0.020874023,0.016418457,-0.030029297,-0.028244019,-0.022415161,-0.004383087,-0.015975952,0.039916992,0.007843018,0.02458191,0.02130127,-0.037994385,-0.008140564,-0.012832642,-0.024383545,-0.00057411194,-0.0035495758,-0.016845703,0.004020691,0.009170532,0.013587952,-0.002614975,0.042999268,-0.02229309,-0.0067100525,0.026412964,0.036010742,-0.01121521,0.033172607,-0.020095825,0.008171082,-0.01826477,0.0029582977,-0.008483887,0.011100769,0.000030577183,0.018493652,0.0038108826,0.033477783,0.017120361,-0.0128479,0.0027427673,0.02432251,0.018844604,0.013916016,0.024841309,0.009063721,0.017166138,-0.012107849,-0.0054359436,0.0016784668,0.049560547,0.033172607,0.007282257,-0.016204834,0.011558533,-0.025238037,0.0103302,0.02394104,-0.021224976,-0.03665161,-0.009407043,-0.035125732,0.0009765625,-0.005973816,0.015335083,-0.007369995,0.029052734,-0.0146865845,-0.033081055,-0.018310547,0.02949524,0.02468872,-0.013496399,-0.017623901,0.0029201508,0.011985779,-0.023086548,-0.007965088,-0.04486084,-0.048797607,0.021774292,-0.014930725,0.020828247,0.0031528473,-0.0009880066,-0.009429932,-0.02444458,-0.011062622,0.011054993,0.012702942,-0.0037231445,0.0028743744,0.023391724,0.030883789,-0.009925842,0.022979736,0.0001513958,0.02116394,0.01586914,-0.011154175,0.014289856,-0.004875183,0.030075073,-0.004009247,0.01914978,0.023910522,-0.007335663,0.015716553,-0.052246094,0.0020217896,0.0078125,-0.0038547516,0.035583496,-0.01576233,-0.027175903,-0.00944519,-0.02267456,-0.028244019,-0.0070152283,0.008666992,0.03062439,-0.010940552,0.052124023,-0.003396988,-0.014030457,0.0030155182,0.02142334,-0.013137817,0.009063721,0.02394104,-0.016235352,0.005584717,-0.0061454773,-0.0109939575,-0.0067214966,-0.020858765,0.005970001,-0.0017213821,0.0076179504,0.010185242,0.016921997,0.04019165,0.013809204,0.026397705,0.0037555695,0.00806427,0.025024414,0.0038051605,0.036315918,-0.00087451935,-0.026260376,-0.0006995201,-0.005569458,-0.028305054,0.0028800964,-0.0015497208,-0.004917145,-0.03010559,0.0061912537,0.00031161308,0.024993896,-0.0070152283,0.01083374,-0.012832642,-0.0077590942,-0.025680542,-0.013771057,-0.0206604,0.014228821,0.021499634,-0.008880615,0.035980225,0.0026397705,-0.015960693,0.01386261,0.034179688,0.0019388199,-0.022857666,-0.021865845,0.007255554,-0.0021476746,0.0050354004,0.013061523,-0.029342651,-0.018127441,0.0054779053,-0.0070152283,0.00051259995,0.000037014484,0.016174316,-0.0057029724,-0.0069503784,-0.017974854,0.023422241,-0.016235352,-0.021240234,-0.0012922287,0.01373291,0.025360107,0.030563354,-0.004508972,-0.0035381317,0.02784729,-0.030883789,0.064208984,-0.0069618225,0.020889282,-0.014945984,-0.0030784607,-0.053131104,-0.016220093,-0.010383606,-0.012908936],"createdAt":"2026-04-18T18:58:34.645Z","updatedAt":"2026-04-25T00:05:09.785Z","lastSeenAt":"2026-04-25T00:05:09.785Z","tsv":"'/api':174 '/api/v1/transactions/123/receipt':212 '/docs':173 '/pricing':175 '/readme':177 '/request':17,34 '0.02':16,33,97,154 '000':93 '0x8335':81 '20':92 '2913':82 '402':220 '6':101 'Base network API' 'USDC micropayment endpoint' 'actual':224 'advertis':107 'ai':124 'analysi':127 'analyt':118 'api':44,115,159 'avail':204 'base':9,26,76,94 'base-network' 'broader':104 'call':4,21,52,114 'challeng':88,221 'classif':130 'commit':167 'connect':183 'contract':80 'convers':147 'crawl':207 'data':117,121 'decim':102 'detail':190 'document':168,199 'embed':131 'endpoint':7,24,36,150,210 'estim':141 'exact':86 'exact-schem':85 'exampl':203 'exchang':136 'export':122 'extrem':170 'feed':135 'financ':132 'gas':140 'gate':45 'generat':148 'geocod':145 'given':62,98 'i.e':96 'id':66 'identifi':64 'infrastructur':143 'insight':123 'json':58 'json-response' 'key':160 'limit':163 'list':152 'live':214 'lowpaymentfee' 'lowpaymentfee.com':38,105 'metric':119 'minimum':166 'ml':125 'network':77 'no-api-key' 'openapi':194 'page':178 'path':70 'pay':2,19,112 'pay-per-cal':1,18,111 'pay-per-call' 'pay-per-request API' 'payload':226 'payment':49,71 'per':3,20,113,155 'platform':106 'post':54 'price':134 'probe':211 'prompt':185 'protocol':50 'provid':39 'quot':139 'rate':137,162 'receipt':6,23,42,59 'render':180 'report':120 'request':156 'request/response':197 'requir':89 'respons':225 'retriev':43 'return':56,216 'schema':198 'scheme':87 'sentiment':126 'settl':12,29,73 'span':116 'spars':171 'spec':195 'specif':209 'structur':227 'suit':109 'summar':129 'technic':189 'text':128 'token':138 'transact':5,22,41,63 'transaction receipt API' 'transaction-receipt' 'unit':95 'unknown':229 'url':69 'usag':202 'usdc':14,31,79,99 'usdc-settlement' 'use':78 'util':144 'valid':146,218 'via':10,27,53 'wallet':184 'web3':133 'x402':11,28,48,219 'x402 payment API' 'x402-payment'","prices":[{"id":"1de04bf0-bd99-41fd-a902-b26523fc436d","listingId":"1dc4bc02-ef11-499d-964c-8742e1aead10","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/123/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":"2026-04-18T18:58:34.645Z"}],"sources":[{"listingId":"1dc4bc02-ef11-499d-964c-8742e1aead10","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/123/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:34.645Z","lastSeenAt":"2026-04-25T00:05:09.785Z"}],"details":{"listingId":"1dc4bc02-ef11-499d-964c-8742e1aead10","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/123/receipt\n# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof to receive the receipt.","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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/123/receipt"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving transaction receipts programmatically with per-call USDC micropayments","Integrating pay-as-you-go API access into agent workflows without API key management","Fetching financial transaction data on-demand via crypto-native payment rails"],"bestFor":["Agents or services that need on-demand transaction receipt retrieval without subscription overhead","Developers building on Base who want USDC-settled API access","Scenarios requiring keyless, permissionless API consumption"],"notFor":["High-volume batch processing where per-call pricing becomes expensive","Use cases requiring detailed API documentation or guaranteed SLAs","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.683Z"},"updatedAt":"2026-04-25T00:05:09.785Z"}}