{"id":"9107e70f-3bca-4bf5-af2d-24afdf0d23ca","shortId":"wFQzns","kind":"x402","title":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","tagline":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource at `/api/v1/transactions/272/receipt`. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint probed returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made via the x402 \"exact\" scheme to the specified wallet address. The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the receipt endpoint actually returns. The endpoint is live (402 challenge confirmed), but the lack of documentation makes it difficult to know what data is returned or what input parameters (if any) are expected in the POST body.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","transaction-receipt","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","USDC micropayment","Base network API","pay-per-request","lowpaymentfee"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet'","No OpenAPI or output schema provided for the receipt endpoint","The endpoint path includes a hardcoded transaction ID (272), which may indicate a demo or specific-use resource rather than a general-purpose API","No request body schema documented; unclear what POST body is expected","No response examples or schema available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/272/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/272/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 works. However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the specific purpose of this receipt endpoint (transaction 272) is unclear. The platform lists many endpoints but provides no detail on any of them.","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":"2026-04-19T12:52:26.744Z","embedding":[-0.037902832,-0.029678345,0.029510498,0.0069084167,-0.011222839,-0.012397766,-0.0036392212,0.03378296,0.050567627,-0.0657959,0.019500732,-0.034454346,-0.013389587,-0.04611206,-0.02067566,0.019363403,-0.0049209595,0.033813477,-0.04135132,0.027923584,0.031677246,-0.045684814,-0.021484375,0.01701355,-0.010063171,-0.023284912,-0.03881836,-0.005428314,-0.052612305,-0.030838013,0.056427002,-0.018539429,-0.02381897,0.001449585,-0.012413025,0.026107788,0.014045715,0.010513306,0.031173706,-0.016952515,-0.0016841888,-0.044036865,-0.00036931038,0.0037994385,-0.043395996,0.0061149597,-0.00046658516,-0.00015366077,0.016448975,-0.004928589,-0.053649902,-0.011016846,0.0030231476,0.022201538,-0.0031929016,-0.0018968582,-0.0075683594,-0.0005674362,0.02130127,-0.007205963,-0.011413574,-0.061523438,-0.016204834,-0.022827148,0.0058174133,0.045715332,-0.011962891,0.06793213,0.016220093,0.054473877,0.037139893,0.048431396,0.032989502,0.024673462,0.012687683,-0.015182495,-0.009376526,0.023742676,-0.045318604,-0.021774292,-0.0068473816,-0.031677246,-0.07269287,-0.0048294067,-0.03036499,-0.04937744,-0.03253174,0.0007491112,-0.01689148,0.017105103,-0.06707764,0.0066070557,0.025299072,0.024551392,0.0051612854,-0.049468994,-0.028335571,0.00630188,-0.0184021,0.00182724,-0.018630981,-0.029052734,0.040130615,-0.009925842,0.036132812,0.03567505,-0.009513855,0.01448822,-0.0058288574,0.001449585,0.0026435852,0.02029419,0.025970459,-0.04107666,0.0075416565,-0.0024585724,-0.018066406,0.010803223,-0.019180298,0.034454346,-0.0413208,0.06640625,-0.008529663,-0.0011444092,-0.0013103485,-0.04171753,-0.029342651,0.023391724,-0.02897644,0.014778137,0.05886841,0.033172607,-0.0043182373,-0.007888794,-0.018493652,0.011909485,-0.016204834,-0.0047187805,-0.02696228,-0.04006958,0.019424438,-0.021865845,0.0064353943,0.044769287,-0.082214355,-0.0054893494,-0.051940918,0.015525818,-0.016052246,-0.0104522705,0.012870789,0.0064468384,-0.014129639,-0.021026611,-0.007972717,-0.023269653,-0.0036373138,0.04663086,-0.002544403,0.023468018,-0.007030487,0.043792725,0.027145386,0.018615723,0.01058197,0.009109497,-0.0053367615,-0.06286621,-0.07720947,0.010940552,0.026947021,-0.03579712,-0.03479004,0.0032463074,-0.025619507,-0.07940674,0.0028018951,0.013374329,0.010025024,-0.054901123,0.005870819,-0.030960083,0.0003118515,-0.025527954,-0.031982422,-0.035369873,-0.030532837,0.05618286,0.029312134,0.024749756,0.008201599,0.00005853176,0.038726807,0.017730713,0.0018749237,-0.025619507,-0.009765625,-0.015640259,0.02784729,-0.01838684,0.010070801,-0.018203735,0.014251709,0.08166504,-0.008636475,-0.058044434,-0.0034561157,-0.042663574,-0.0395813,-0.017608643,0.014526367,0.007671356,-0.011581421,0.042022705,-0.048919678,-0.0011310577,0.024658203,0.044006348,0.008323669,0.049346924,0.022125244,-0.01727295,0.011184692,0.02229309,-0.02645874,0.06976318,0.020233154,0.018661499,-0.013435364,-0.05834961,-0.00022351742,0.020736694,-0.025405884,-0.004009247,-0.011672974,0.033813477,-0.00374794,-0.016433716,0.021835327,-0.007080078,-0.014083862,-0.02330017,0.00299263,0.026138306,0.021713257,-0.014839172,-0.05303955,-0.078308105,0.08508301,0.03552246,0.022476196,0.009887695,-0.0013542175,-0.013755798,-0.03390503,-0.072631836,0.034118652,0.05407715,-0.0129470825,-0.028869629,0.038635254,-0.014205933,-0.044555664,0.0033893585,-0.02897644,-0.0368042,-0.0132751465,-0.00030612946,-0.03237915,0.019622803,-0.004623413,0.013175964,0.052947998,0.017196655,-0.055267334,-0.02243042,-0.02381897,0.008880615,-0.01626587,-0.010765076,0.010978699,0.033294678,0.009895325,0.016723633,-0.0051651,0.02532959,0.0016469955,-0.019058228,0.013969421,0.008056641,-0.019500732,0.018218994,-0.0017118454,-0.048828125,0.007358551,0.00094890594,0.07543945,-0.06225586,0.054870605,-0.016784668,-0.00207901,0.054779053,-0.011749268,-0.0491333,0.017166138,0.016937256,0.002603531,0.019744873,0.018981934,0.01171875,-0.023635864,0.061706543,-0.023544312,-0.0013237,0.024353027,0.0067977905,0.03829956,-0.012565613,-0.061065674,-0.04812622,0.016708374,-0.03213501,0.03112793,-0.0045814514,0.04348755,-0.005874634,-0.0045547485,-0.04083252,0.0023841858,0.0044784546,0.009681702,-0.03353882,-0.0041542053,-0.026748657,-0.013595581,0.045684814,-0.0018396378,-0.0009665489,0.015823364,0.072143555,0.024932861,-0.008934021,-0.025848389,-0.037231445,-0.026062012,-0.0112838745,0.023590088,0.006576538,0.020965576,0.03768921,-0.028289795,0.016494751,0.028579712,-0.0034866333,0.032348633,0.009002686,-0.013633728,-0.072021484,-0.032958984,-0.035461426,-0.057128906,0.034454346,0.016204834,0.00315094,0.05114746,0.0032920837,-0.02407837,-0.027267456,0.03753662,-0.051971436,0.0049591064,0.04269409,-0.029922485,-0.014549255,-0.0069999695,-0.004508972,0.005710602,0.029800415,0.01436615,0.025970459,0.05593872,0.041259766,-0.014930725,0.01448822,0.02204895,0.01626587,-0.008491516,-0.012741089,-0.015075684,-0.035003662,0.028778076,-0.01626587,-0.024505615,-0.050109863,0.057159424,0.039855957,0.05026245,0.020233154,0.02909851,0.03564453,0.04232788,0.021102905,0.0014219284,-0.022567749,-0.030975342,-0.019744873,0.03427124,-0.017944336,-0.013946533,-0.0033931732,0.022018433,0.00026011467,0.010375977,-0.026306152,0.038482666,-0.017364502,-0.015296936,0.032409668,0.02720642,0.048797607,0.037994385,-0.02557373,-0.005130768,0.028137207,-0.044036865,0.025619507,0.015960693,-0.009597778,-0.010437012,-0.052368164,-0.03262329,0.005947113,-0.0042762756,-0.039093018,0.0030498505,0.0069084167,0.031280518,0.033233643,-0.03387451,-0.037384033,0.021499634,-0.019958496,-0.04421997,0.006614685,-0.052124023,0.024963379,0.028778076,-0.039276123,0.043945312,-0.0047416687,0.0051651,-0.021316528,-0.002916336,-0.003627777,0.005470276,-0.025772095,0.032958984,0.0008625984,0.0007634163,0.009468079,0.035461426,0.014732361,0.03036499,0.030151367,0.015205383,-0.025665283,-0.060546875,0.037322998,-0.05026245,-0.0030612946,0.02998352,-0.036315918,0.010757446,0.0007157326,-0.021316528,-0.03427124,0.009117126,-0.012992859,0.0040245056,0.00995636,-0.030273438,-0.002691269,-0.0501709,-0.013900757,-0.009269714,0.050323486,-0.003145218,0.00315094,-0.06677246,0.009635925,0.020370483,0.0017929077,0.00073194504,-0.012191772,-0.006072998,-0.0025691986,-0.005092621,-0.019683838,-0.014533997,0.03326416,0.0038700104,0.00070524216,0.01725769,0.023590088,0.009643555,0.019577026,-0.013717651,0.041503906,-0.011947632,-0.0020618439,0.006954193,0.031921387,0.015403748,-0.042877197,-0.050811768,0.042236328,-0.019882202,0.027191162,-0.04321289,-0.008049011,-0.00737381,0.00349617,0.015716553,0.0056037903,0.0059051514,0.0040359497,-0.03555298,-0.057647705,0.034332275,-0.007858276,0.036010742,0.027801514,0.009063721,0.028701782,-0.002336502,0.012420654,0.007194519,-0.03579712,-0.028686523,-0.029663086,-0.032196045,-0.024475098,-0.0060539246,-0.028533936,0.023162842,-0.0054397583,0.008300781,-0.011978149,-0.01876831,0.05569458,-0.00038433075,0.004219055,0.01322937,0.0036468506,0.020385742,0.018951416,0.016571045,-0.06463623,0.049072266,-0.01374054,-0.0011062622,-0.021072388,0.0096588135,0.02545166,-0.029586792,0.016845703,-0.019729614,-0.015823364,-0.00020039082,-0.003414154,-0.0011949539,0.007751465,0.014808655,-0.059753418,0.026916504,-0.005027771,-0.02658081,-0.04159546,0.018478394,0.021652222,-0.032409668,0.011932373,0.024353027,0.052124023,-0.013923645,-0.0010967255,0.006336212,0.046539307,0.04498291,0.0037021637,0.00014173985,0.034454346,-0.0008778572,0.036590576,-0.00434494,-0.007217407,0.001077652,-0.0008840561,0.026382446,0.03643799,0.011024475,0.005722046,-0.029266357,-0.021560669,0.0042381287,-0.015174866,0.023269653,0.008422852,0.01914978,-0.015640259,0.016494751,0.02671814,-0.035736084,-0.00844574,0.015335083,0.05105591,-0.01171875,-0.0076026917,0.0065841675,0.027328491,0.0317688,-0.050689697,-0.01461792,0.000016152859,0.012039185,-0.0015611649,-0.049224854,-0.022964478,-0.004501343,0.044281006,-0.0023498535,0.013130188,0.04095459,0.013412476,-0.008155823,0.030960083,0.007080078,-0.011756897,-0.005619049,-0.039123535,-0.011810303,0.0010271072,0.009292603,-0.02470398,0.028121948,-0.002620697,-0.024429321,0.010749817,-0.036468506,0.0040512085,-0.01864624,-0.009498596,0.029052734,-0.011131287,0.011871338,0.0022964478,-0.03933716,0.006164551,0.02633667,0.0072631836,-0.026672363,0.025253296,-0.009109497,-0.00031781197,-0.011566162,0.00730896,0.016189575,0.0078125,0.027450562,0.029312134,-0.030761719,0.04473877,-0.01977539,0.01486969,0.008056641,-0.017318726,-0.02017212,-0.036987305,-0.021316528,0.03225708,-0.012802124,-0.01020813,-0.018737793,-0.05593872,-0.023605347,-0.053588867,0.027267456,0.022460938,0.047943115,-0.010017395,0.012123108,-0.015838623,0.005504608,0.010604858,0.00894165,-0.01272583,0.0501709,0.011993408,0.02178955,0.003370285,-0.025848389,-0.02760315,-0.0006146431,-0.053985596,-0.044525146,-0.0014486313,0.029663086,-0.004219055,-0.014778137,-0.033294678,-0.028778076,0.003232956,-0.023864746,0.008552551,-0.0041007996,0.020645142,0.00046992302,0.012184143,-0.0018358231,0.024139404,-0.028656006,0.027435303,0.009880066,0.00068616867,-0.027648926,0.011222839,0.02911377,0.0075263977,-0.013961792,-0.018325806,0.0075263977,-0.015670776,-0.055847168,0.027328491,0.001534462,-0.01184082,-0.018005371,0.015487671,-0.042388916,0.0037441254,-0.05090332,-0.018005371,0.0054512024,0.023406982,0.014549255,-0.0020713806,0.009498596,0.009376526,-0.016403198,-0.042816162,0.015464783,0.008354187,0.002735138,0.020858765,0.066711426,0.012702942,-0.021438599,-0.014350891,-0.032165527,-0.001964569,-0.028259277,0.011299133,-0.0037899017,0.013534546,-0.008171082,-0.010513306,-0.04736328,0.014778137,0.059173584,-0.004611969,-0.006149292,-0.009048462,-0.002910614,0.02684021,0.032928467,-0.030410767,0.008430481,-0.009475708,0.022598267,-0.028381348,0.012481689,-0.013053894,0.03540039,-0.011741638,-0.04763794,0.0015935898,-0.032440186,-0.003824234,-0.062805176,-0.031051636,-0.056030273,-0.0034999847,0.016693115,-0.019485474,0.009147644,0.0087890625,-0.025421143,-0.08026123,0.008308411,0.0435791,-0.0026416779,0.015609741,-0.006576538,0.023391724,0.01739502,-0.02017212,-0.020935059,0.008796692,-0.02243042,-0.00092983246,-0.03390503,0.030273438,-0.01020813,-0.0115356445,0.017227173,0.006801605,0.014045715,-0.012062073,-0.0046844482,-0.01676941,0.0041923523,-0.008377075,0.012428284,-0.014167786,-0.015838623,0.036743164,-0.052215576,0.02357483,0.025848389,0.011932373,0.0049705505,0.03768921,0.033325195,-0.023757935,0.0050964355,0.0075302124,0.024337769,0.050109863,-0.027893066,0.031433105,0.017684937,0.0051841736,-0.0030651093,0.0013942719,0.004322052,-0.037078857,-0.021270752,0.02557373,0.0011711121,-0.020263672,-0.006351471,-0.00042247772,0.014305115,0.029434204,0.0023345947,-0.022827148,-0.019683838,-0.033721924,0.0053215027,0.006351471,0.0049476624,-0.015083313,0.018722534,0.04473877,0.04449463,0.021774292,-0.010063171,0.013114929,0.024551392,-0.012649536,-0.0129470825,0.020568848,0.016403198,0.02330017,0.0076675415,0.018859863,-0.03173828,-0.02772522,-0.010406494,-0.012496948,0.015731812,-0.018554688,0.010368347,0.009613037,0.004219055,0.007080078,-0.018203735,0.0011253357,-0.031799316,-0.04156494,-0.020812988,-0.008895874,0.017044067,-0.012702942,-0.015991211,0.03503418,-0.011184692,0.042633057,0.0017814636,-0.020553589,0.015853882,0.04006958,0.016464233,-0.015396118,0.0038490295,-0.0045776367,-0.02217102,-0.0070610046,-0.024993896,0.038024902,0.0025787354,-0.00079393387,0.009155273,-0.0064735413,0.029632568,-0.031707764,0.00095129013,-0.0146484375,0.021453857,-0.012664795,0.05770874,-0.04901123,0.032409668,0.017028809,-0.0046577454,0.01134491,0.0030231476,-0.017166138,0.02267456,0.016464233,-0.0064048767,0.019958496,0.00079631805,0.032287598,-0.021850586,-0.010848999,-0.01626587,-0.026550293,-0.04034424,-0.0037193298,-0.00995636,-0.012992859,0.017715454,-0.023010254,0.022567749,-0.019714355,0.0058937073,-0.004386902,0.015930176,-0.015548706,-0.004348755,-0.008575439,-0.0262146,-0.028213501,-0.0005168915,-0.002243042,0.06719971,0.0129852295,0.027801514,0.039642334,0.01979065,0.010971069,-0.03677368,-0.029174805,0.0019950867,-0.014808655,0.0015516281,-0.014572144,0.04751587,0.04788208,0.0030460358,0.0357666,0.015258789,0.03604126,-0.0077438354,0.025222778,-0.02027893,0.017120361,-0.01651001,0.02909851,-0.023635864,0.026626587,-0.02381897,0.027801514,0.019485474,0.028076172,-0.019958496,0.02218628,0.06903076,0.007873535,-0.025665283,0.015777588,-0.005004883,-0.024536133,-0.019241333,-0.0231781,0.050567627,0.013389587,0.03463745,0.053588867,0.01576233,0.017318726,0.024215698,-0.017288208,-0.009460449,0.056030273,0.019973755,0.0026130676,-0.018188477,-0.005329132,0.0121536255,-0.033721924,-0.009773254,0.0007824898,-0.032226562,-0.011795044,0.012489319,-0.0077285767,-0.011558533,0.019866943,0.011734009,0.032440186,-0.014755249,0.028076172,0.0132369995,-0.014595032,0.011657715,0.00868988,0.013519287,-0.033081055,-0.026351929,0.020309448,0.029678345,-0.010765076,-0.029922485,0.032714844,0.0070228577,0.042419434,0.04095459,-0.024917603,-0.00049829483,0.027389526,0.0039405823,0.0073280334,0.06463623,0.027389526,0.001247406,0.045135498,0.023483276,0.036834717,-0.035369873,0.031982422,-0.005458832,0.00737381,-0.022750854,0.009750366,0.009681702,-0.0131073,0.04269409,-0.009063721,-0.0033493042,0.011230469,0.029052734,-0.0059127808,-0.0066490173,-0.025222778,0.003921509,-0.022323608,-0.021133423,0.02218628,-0.00756073,0.011978149,0.0074272156,0.03692627,-0.04815674,0.026550293,0.009063721,-0.019058228,-0.024246216,0.024734497,-0.05303955,-0.0029907227,-0.001657486,-0.012199402,-0.040283203,0.0053634644,0.015930176,-0.016860962,0.011665344,0.00579834,0.0038871765,-0.0022602081,0.03829956,0.01449585,0.001452446,0.0020923615,-0.019180298,0.0037994385,0.038848877,0.01184845,-0.015838623,-0.015304565,0.0020332336,0.008628845,-0.012893677,-0.0068893433,0.011711121,-0.026184082,-0.024047852,0.01737976,0.04473877,-0.00018048286,0.055145264,-0.01979065,-0.010803223,0.0067977905,0.039215088,-0.0024662018,-0.03012085,-0.012542725,0.010757446,-0.03616333,0.04711914,0.036132812,0.0030269623,0.029342651,0.010848999,-0.022506714,-0.0079574585,-0.023666382,0.03363037,-0.0066184998,-0.007297516,-0.005138397,0.012786865,-0.010940552,-0.018478394,-0.009246826,-0.032928467,-0.019699097,-0.0059928894,0.023513794,0.00020480156,0.024856567,0.042419434,0.018249512,-0.016494751,0.047180176,-0.027679443,0.042755127,0.0061073303,-0.014549255,0.045562744,0.032806396,0.05569458,0.014770508,0.018432617,-0.026184082,0.0362854,0.031219482,0.02281189,0.006969452,0.0049972534,-0.016662598,0.030593872,-0.0007247925,0.03338623,0.0008983612,-0.014221191,0.016983032,-0.019836426,-0.007972717,0.005970001,-0.0112838745,-0.005886078,0.051239014,-0.028808594,-0.0067596436,-0.025375366,-0.016571045,0.01965332,-0.01512146,-0.003370285,0.00033783913,-0.016708374,0.024429321,-0.008987427,-0.0068511963,0.012390137,0.031219482,-0.050598145,0.007827759,0.020874023,-0.007019043,-0.0075263977,0.019332886,0.052856445,-0.0052261353,-0.0023117065,0.041625977,-0.02053833,0.040039062,-0.00017678738,0.030792236,0.018203735,0.0109939575,-0.00793457,0.014007568,0.013069153,-0.017684937,0.0029773712,0.02659607,-0.010055542,-0.00085639954,-0.0019350052,-0.0074882507,-0.0053520203,-0.002538681,-0.0178833,0.010276794,-0.018676758,-0.014190674,0.010108948,0.018478394,-0.008216858,0.0073776245,0.0042304993,-0.008300781,0.011993408,0.018920898,0.030227661,-0.048217773,0.0061073303,0.0077438354,0.002658844,-0.009651184,-0.016586304,-0.0065994263,-0.035736084,-0.0010290146,0.013389587,0.0016489029,0.009773254,-0.003211975,-0.019592285,0.019729614,0.012641907,0.012275696,-0.005870819,0.010635376,0.024002075,-0.03793335,0.004508972,-0.00044322014,-0.013336182,0.013702393,0.033081055,-0.017181396,-0.022064209,0.007827759,-0.0069007874,0.02116394,-0.006755829,0.011619568,0.020767212,-0.013320923,0.009590149,-0.005859375,0.027801514,-0.02708435,-0.017196655,-0.0028858185,0.01096344,0.05105591,-0.0022411346,0.004699707,0.013046265,0.029067993,0.0154800415,0.030975342,0.014839172,0.05203247,0.020843506,-0.022827148,-0.012313843,0.004020691,0.0011911392,-0.027679443,0.016525269,-0.030166626,-0.0057907104,-0.0076522827,0.021972656,-0.0033245087,-0.040283203,-0.010887146,-0.0018720627,-0.0036735535,0.021484375,-0.010467529,0.029190063,-0.014228821,0.0040664673,0.02357483,-0.019485474,-0.025894165,-0.029266357,-0.022918701,-0.012329102,-0.056030273,0.016159058,-0.030883789,0.016311646,-0.012275696,0.0003259182,0.0016317368,0.007255554,0.0012044907,-0.014511108,0.006881714,0.044311523,0.017089844,0.00630188,0.011459351,-0.032470703,-0.019851685,-0.014350891,0.00053071976,-0.015419006,0.038208008,0.0064964294,0.024429321,0.012062073,-0.04537964,-0.011268616,-0.009307861,-0.0072746277,-0.0017547607,-0.0047187805,-0.0047035217,0.0070495605,0.008911133,0.024368286,-0.005241394,0.038970947,-0.034820557,-0.007980347,0.031799316,0.036010742,-0.0019321442,0.048675537,-0.017089844,0.00422287,-0.04269409,0.0020141602,-0.007980347,0.009857178,-0.011543274,0.025009155,-0.0099487305,0.032165527,0.0073242188,-0.018798828,0.00617218,0.029922485,0.020248413,0.018997192,0.01864624,0.026504517,0.013641357,-0.019134521,-0.0025291443,-0.004436493,0.037994385,0.021621704,-0.0035362244,-0.0178833,0.018127441,-0.022659302,0.003112793,0.026992798,-0.020217896,-0.03878784,-0.02053833,-0.0440979,0.010025024,-0.0007019043,0.007183075,-0.0054130554,0.016723633,-0.01524353,-0.017456055,-0.02885437,0.02482605,0.0074501038,-0.021530151,-0.007171631,-0.0042533875,0.018234253,-0.01612854,-0.004890442,-0.047729492,-0.040161133,0.010719299,-0.01991272,0.03765869,0.0013952255,-0.011207581,-0.018096924,-0.008895874,-0.0096588135,0.019729614,0.023834229,-0.0040359497,-0.0022449493,0.008468628,0.047027588,-0.0011739731,0.023620605,-0.005168915,0.017364502,0.009429932,-0.00015234947,0.026824951,-0.013618469,0.03390503,-0.0007920265,0.008628845,0.032836914,0.0072021484,0.02168274,-0.047302246,-0.0067596436,0.0002193451,-0.0072250366,0.028900146,-0.011154175,-0.042053223,-0.006629944,-0.020858765,-0.029922485,0.00060510635,0.0054740906,0.015335083,-0.0077590942,0.037017822,-0.009857178,-0.024139404,0.008453369,0.008224487,-0.02809143,0.0155181885,0.022338867,-0.023651123,-0.0038337708,-0.009399414,-0.013458252,-0.009529114,-0.01096344,-0.0021743774,-0.013824463,0.004432678,-0.004917145,0.024795532,0.027114868,0.015960693,0.021087646,0.004020691,0.015197754,0.028533936,0.012504578,0.04208374,-0.0071640015,-0.01725769,-0.0085372925,0.00084352493,-0.028320312,0.02180481,-0.0017662048,-0.0052871704,-0.035858154,0.009048462,0.010047913,0.02949524,0.014549255,0.01979065,-0.010360718,-0.0075569153,-0.024963379,-0.010574341,-0.037322998,0.02331543,0.021697998,-0.0037651062,0.028335571,0.004962921,-0.019088745,0.01096344,0.04156494,-0.00819397,-0.038848877,-0.018798828,0.0045928955,-0.011520386,0.010627747,0.01033783,-0.028076172,-0.022018433,0.008735657,-0.01524353,-0.015563965,-0.012306213,0.017837524,0.010482788,-0.013496399,-0.021240234,0.017196655,-0.0002641678,-0.015419006,-0.0033779144,0.008857727,0.028137207,0.021621704,-0.0064735413,-0.0027980804,0.03353882,-0.029830933,0.06854248,-0.014953613,0.021331787,-0.024551392,-0.001616478,-0.05960083,-0.010948181,-0.0206604,-0.011932373],"createdAt":"2026-04-18T18:59:45.050Z","updatedAt":"2026-04-24T15:03:06.798Z","lastSeenAt":"2026-04-24T15:03:06.798Z","tsv":"'/api':149 '/api/v1/transactions/272/receipt':37 '/docs':147 '/pricing':148 '/readme':151 '0.02':96,123 '000':91 '20':90 '402':83,187 '6':101 'Base network API' 'USDC micropayment' 'across':126 'actual':181 'address':117 'advertis':120 'ai/ml':58 'analyt':57 'api':54,132 'base':5,18,73,92 'base-network' 'bodi':215 'broader':43 'call':9,22,53,104 'challeng':84,188 'commit':140 'confirm':189 'connect':157 'content':163 'data':56,61,201 'decim':102 'difficult':197 'document':142,172,194 'endpoint':3,16,28,79,129,180,184 'exact':111 'exampl':175 'expect':211 'extrem':144 'finance/web3':60 'flat':122 'infer':59 'infrastructur':63 'input':206 'key':133 'know':199 'lack':192 'limit':136 'live':186 'lowpaymentfee' 'lowpaymentfee.com':30 'made':107 'make':195 'minimum':139 'network':74 'no-api-key' 'offer':46 'openapi':167 'page':152 'paid':6,19 'paramet':207 'part':40 'pay':51 'pay-per-cal':50 'pay-per-call' 'pay-per-request' 'payment':86,105 'payment receipt' 'per':8,21,52,103,124 'per-cal':7,20 'platform':44,119 'post':214 'probe':80 'prompt':159 'protocol':70 'provid':31 'rate':135 'receipt':2,15,34,179 'render':154 'request':85,125 'request/response':170 'requir':141 'resourc':35 'return':81,182,203 'schema':171 'scheme':112 'settl':66 'sinc':98 'span':55 'spars':145 'spec':168 'specif':78 'specifi':115 'transact':1,14,33 'transaction receipt' 'transaction-receipt' 'unit':93 'usd':97 'usdc':13,26,76,95,99 'usdc-settlement' 'use':75,100 'util':64 'varieti':48 'via':10,23,67,108 'wallet':116,158 'x402':11,24,69,110 'x402 API' 'x402-payment'","prices":[{"id":"fdaea5a5-7c12-4b2d-a2d4-165ccb40a656","listingId":"9107e70f-3bca-4bf5-af2d-24afdf0d23ca","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/272/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":"2026-04-18T18:59:45.050Z"}],"sources":[{"listingId":"9107e70f-3bca-4bf5-af2d-24afdf0d23ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/272/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:45.050Z","lastSeenAt":"2026-04-24T15:03:06.798Z"}],"details":{"listingId":"9107e70f-3bca-4bf5-af2d-24afdf0d23ca","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/272/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 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/272/receipt"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/272/receipt"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for a specific transaction ID","Programmatic proof-of-payment or audit trail retrieval","Agent-driven workflows that need transaction confirmation data"],"bestFor":["Developers wanting keyless, pay-per-call API access on Base","Agents that can settle USDC payments via x402 protocol","Use cases requiring low-cost ($0.02) per-request pricing with no commitments"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","High-volume batch processing where per-call costs add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.342Z"},"updatedAt":"2026-04-24T15:03:06.798Z"}}