{"id":"c0c257b0-edcc-4678-a7b8-f0afaf8d7070","shortId":"gx3qF9","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to a transaction receipt resource (transaction ID 393) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The endpoint returns a 402 challenge requiring an X-PAYMENT header with a maximum amount of 20,000 base units (i.e., $0.02 USDC, since USDC uses 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 & 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 listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific endpoint being listed here is scoped to `/api/v1/transactions/393/receipt`, which appears to be a receipt retrieval resource rather than one of the general-purpose API categories.\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 example payloads available. The endpoint is confirmed live (402 challenge captured), but the actual response format and content after payment are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available — response format after payment is unknown","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content","The endpoint path references a specific transaction ID (393); it is unclear if this is a general-purpose resource or a single fixed receipt","The platform lists many API categories on its homepage but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/393/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/393/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 (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no examples, and the docs pages are empty. The specific endpoint path (/transactions/393/receipt) is narrow and not described anywhere on the site. 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":"2026-04-19T13:37:55.491Z","embedding":[-0.03375244,-0.036468506,0.03137207,0.0068206787,-0.00623703,-0.030731201,-0.010848999,0.022583008,0.061950684,-0.07342529,0.024154663,-0.037506104,-0.029815674,-0.028182983,-0.018951416,0.012145996,0.013168335,0.031311035,-0.03744507,0.018844604,0.017288208,-0.03942871,-0.0390625,0.015403748,-0.007537842,-0.026931763,-0.025802612,-0.008773804,-0.038269043,-0.027389526,0.047607422,-0.022628784,-0.02116394,0.0052337646,-0.014373779,0.0072631836,0.000006556511,0.012245178,0.027618408,-0.030914307,-0.017074585,-0.039794922,0.005279541,-0.008903503,-0.048431396,0.012290955,0.007347107,-0.010978699,0.02456665,-0.015930176,-0.05734253,-0.017227173,0.015113831,0.026870728,0.0053634644,0.01411438,0.0071525574,-0.00045657158,0.012710571,0.008522034,-0.006225586,-0.064697266,-0.0064888,-0.025527954,0.004009247,0.059326172,-0.019073486,0.058929443,0.01159668,0.06555176,0.024383545,0.044677734,0.019744873,0.0065841675,0.018569946,-0.0018119812,0.0010385513,0.038391113,-0.03717041,-0.03842163,-0.004219055,-0.020187378,-0.07470703,0.0007991791,-0.011062622,-0.043395996,-0.016983032,0.0064582825,-0.009216309,0.025909424,-0.07324219,-0.008331299,0.024139404,0.020523071,0.004180908,-0.03048706,-0.030731201,0.0024662018,-0.008781433,0.012039185,-0.0024929047,-0.034820557,0.053710938,-0.009498596,0.031204224,0.048309326,-0.005783081,0.018463135,0.018585205,0.0031528473,-0.014526367,0.023040771,0.022506714,-0.02180481,0.008468628,-0.0062179565,-0.020248413,0.003774643,-0.03265381,0.032989502,-0.04119873,0.059631348,-0.0009975433,-0.0018320084,0.0035247803,-0.041625977,-0.024963379,0.017486572,-0.017532349,0.0006046295,0.038635254,0.018173218,0.010353088,-0.02067566,-0.037994385,0.014602661,-0.015266418,-0.020477295,-0.038726807,-0.047424316,0.026687622,-0.034332275,0.002161026,0.041290283,-0.08050537,0.0048294067,-0.046875,-0.0043182373,-0.009086609,-0.01889038,-0.0013952255,0.008285522,-0.019943237,-0.00894165,-0.018081665,-0.019699097,0.009773254,0.040527344,-0.0113220215,0.031097412,-0.028198242,0.031951904,0.03488159,0.013343811,0.017868042,0.011306763,0.004966736,-0.064208984,-0.081848145,0.004234314,0.008956909,-0.020904541,-0.044433594,0.01638794,-0.025131226,-0.06652832,-0.0043563843,0.0107803345,-0.0054244995,-0.03793335,-0.0010814667,-0.025817871,0.013587952,-0.017944336,-0.04272461,-0.033843994,-0.033691406,0.064697266,0.02746582,0.03274536,0.01763916,-0.009429932,0.03567505,0.02633667,-0.002855301,-0.006504059,0.014450073,-0.024475098,0.015808105,-0.0033912659,0.0070762634,-0.024414062,0.018981934,0.08135986,-0.0032920837,-0.05029297,-0.011314392,-0.043945312,-0.030410767,-0.007843018,0.026367188,-0.00052309036,-0.006389618,0.044830322,-0.039855957,-0.0003349781,0.04034424,0.029434204,0.0066337585,0.050964355,0.025100708,-0.017730713,0.036010742,0.026306152,-0.04473877,0.046081543,0.02909851,0.014755249,-0.025466919,-0.056610107,0.016098022,0.04107666,-0.02494812,0.007205963,-0.0058403015,0.049743652,-0.012191772,-0.0037937164,0.029922485,-0.016174316,-0.032073975,-0.016815186,-0.01386261,0.030075073,0.0024261475,-0.023529053,-0.039733887,-0.08306885,0.06732178,0.03213501,0.020217896,-0.008430481,0.008682251,-0.015136719,-0.022018433,-0.082214355,0.048950195,0.05532837,-0.005268097,-0.032165527,0.058776855,-0.019943237,-0.045898438,0.014175415,-0.016616821,-0.040008545,-0.018157959,-0.0025138855,-0.048675537,0.03048706,-0.011222839,0.011375427,0.0635376,0.018798828,-0.044433594,-0.02293396,-0.028411865,-0.0013933182,-0.018951416,-0.0056762695,-0.0035324097,0.015548706,0.014320374,0.0055160522,-0.0014915466,0.020904541,-0.011703491,-0.0151901245,0.013542175,-0.0032730103,-0.03060913,0.015472412,-0.005722046,-0.05532837,-0.0005950928,-0.009941101,0.07598877,-0.068847656,0.036499023,-0.023117065,0.0076789856,0.06665039,-0.015129089,-0.05053711,0.015792847,0.02909851,0.008171082,0.022323608,0.019348145,-0.016174316,-0.024932861,0.057739258,-0.014640808,-0.015098572,0.014411926,0.012329102,0.03262329,-0.009925842,-0.059936523,-0.0435791,0.022262573,-0.028274536,0.029312134,-0.012214661,0.03475952,-0.0073051453,-0.009422302,-0.029205322,0.00041985512,-0.000054895878,0.012023926,-0.019470215,0.003042221,-0.019454956,-0.023101807,0.04458618,0.013145447,-0.021606445,0.015716553,0.056243896,0.015625,-0.015640259,-0.02973938,-0.03704834,-0.018692017,-0.023864746,0.014526367,0.012641907,0.017486572,0.041625977,-0.023422241,0.012046814,0.030807495,0.005344391,0.02746582,0.01210022,0.00009590387,-0.088012695,-0.025604248,-0.017303467,-0.054473877,0.029434204,0.02029419,0.0052948,0.06719971,0.009338379,-0.04559326,-0.0289917,0.0357666,-0.036102295,0.0059280396,0.050994873,-0.01979065,-0.001490593,-0.00894165,-0.012512207,0.006652832,0.03591919,0.016204834,0.026748657,0.06414795,0.036956787,-0.0023593903,0.018920898,0.009338379,0.018859863,-0.0018568039,-0.024978638,-0.02468872,-0.027740479,0.023910522,-0.03427124,-0.023986816,-0.05871582,0.056152344,0.04864502,0.0637207,0.019363403,0.022506714,0.031341553,0.021316528,0.01953125,0.0026664734,-0.019348145,-0.039031982,-0.035980225,0.03277588,-0.0206604,0.0026226044,-0.0068893433,0.024627686,0.0017623901,0.014335632,-0.020767212,0.031097412,-0.022323608,-0.0010976791,0.037353516,0.022201538,0.052825928,0.057525635,-0.027633667,0.01763916,0.037994385,-0.04232788,0.022079468,0.025131226,-0.023086548,-0.00018024445,-0.04559326,-0.029174805,0.007785797,-0.01309967,-0.039733887,-0.0012702942,0.009353638,0.022644043,0.025436401,-0.02394104,-0.034179688,0.0043792725,-0.020370483,-0.04156494,-0.001543045,-0.040222168,0.019805908,0.015716553,-0.03125,0.04006958,0.0036373138,0.0027599335,-0.018508911,0.015701294,0.019073486,-0.0071907043,-0.03173828,0.028381348,0.0043678284,-0.0023593903,0.0040664673,0.026641846,0.008079529,0.058288574,0.03112793,0.015563965,-0.014205933,-0.07543945,0.029281616,-0.04623413,0.006439209,0.043945312,-0.039276123,0.005554199,0.0058135986,-0.029785156,-0.022994995,0.00630188,-0.025863647,-0.010292053,0.018478394,-0.021911621,-0.016708374,-0.06317139,-0.018295288,-0.0051651,0.03817749,0.003698349,0.016296387,-0.068603516,0.0055618286,0.017181396,0.008079529,0.013664246,-0.013946533,-0.019515991,-0.008758545,-0.0158844,-0.014190674,-0.008171082,0.020492554,-0.0073890686,-0.004753113,0.01739502,0.009643555,0.03225708,0.030944824,0.006828308,0.032165527,-0.0016412735,-0.015022278,0.018936157,0.052093506,0.010017395,-0.04385376,-0.041259766,0.040649414,-0.0069999695,0.033691406,-0.045776367,-0.017944336,-0.008125305,0.007583618,0.0035419464,-0.0029945374,-0.0033874512,-0.007347107,-0.041625977,-0.053588867,0.030654907,-0.012580872,0.039245605,0.033355713,0.013504028,0.016967773,-0.007408142,0.022705078,0.012390137,-0.03164673,-0.025344849,-0.033935547,-0.038848877,-0.033599854,-0.008529663,-0.03250122,0.02180481,-0.01940918,0.016921997,0.0022258759,-0.019348145,0.04208374,-0.00793457,0.009414673,0.004940033,0.0050239563,0.006629944,0.022766113,0.0289917,-0.05239868,0.03378296,0.0019950867,0.004714966,-0.013473511,0.028411865,0.032104492,-0.02772522,0.01171875,-0.01625061,-0.000020325184,-0.019943237,0.0010185242,-0.016723633,0.007511139,-0.0066604614,-0.0625,0.016067505,0.012290955,-0.041015625,-0.044067383,0.018600464,0.0211792,-0.02861023,0.01398468,0.032836914,0.039886475,-0.011726379,0.00065135956,0.0014467239,0.0357666,0.045135498,0.018203735,0.00617218,0.031463623,-0.010421753,0.025894165,-0.0045051575,-0.011047363,0.0077285767,0.007217407,0.030639648,0.019927979,-0.0060653687,0.0049705505,-0.043914795,-0.004638672,0.0059051514,-0.01802063,0.030456543,0.010803223,0.028823853,-0.0129470825,0.009376526,0.011680603,-0.01914978,-0.015625,0.015823364,0.025283813,-0.0075187683,-0.017791748,0.012176514,0.023284912,0.027740479,-0.070007324,-0.010429382,-0.008422852,0.010620117,-0.007045746,-0.04724121,-0.029067993,-0.010154724,0.04321289,0.008018494,0.016174316,0.03955078,0.011886597,0.00012683868,0.019134521,0.008079529,-0.013267517,0.0033454895,-0.04598999,-0.010009766,-0.017868042,0.0038928986,-0.03894043,0.021865845,-0.0022563934,-0.016571045,0.0034656525,-0.03326416,0.005329132,-0.012794495,-0.0050582886,0.030258179,-0.0023441315,0.009819031,-0.010826111,-0.042053223,0.009918213,0.014320374,0.0064735413,-0.036590576,0.019699097,-0.014053345,-0.004928589,-0.010696411,0.004386902,0.025665283,0.013450623,0.017074585,0.027923584,-0.050994873,0.043548584,-0.015434265,0.013618469,0.012779236,-0.023788452,-0.020690918,-0.02861023,-0.009643555,0.030944824,-0.008163452,-0.009170532,-0.033447266,-0.05645752,-0.0158844,-0.059570312,0.017837524,0.022003174,0.03652954,-0.011276245,0.0029563904,-0.02406311,0.00982666,-0.0021381378,0.010375977,-0.013717651,0.03640747,0.014060974,0.019714355,-0.015777588,-0.032165527,-0.03164673,-0.0018587112,-0.047088623,-0.04309082,-0.002462387,0.02319336,-0.0005002022,-0.0058021545,-0.035339355,-0.020401001,-0.0018892288,-0.029129028,0.0084991455,-0.0056114197,0.021026611,-0.00048828125,-0.0064353943,0.0028762817,0.012359619,-0.003414154,0.03363037,0.026260376,-0.0032215118,-0.03149414,0.02909851,0.010467529,0.002796173,-0.01637268,-0.009124756,0.00028944016,-0.021209717,-0.045959473,0.0079193115,0.009254456,-0.015975952,-0.028076172,0.011764526,-0.040527344,0.0038070679,-0.045928955,-0.010368347,0.013656616,0.0071868896,0.0068969727,-0.003862381,0.01789856,-0.006866455,-0.0034236908,-0.04550171,0.028640747,0.009887695,0.0056991577,0.016815186,0.062408447,0.007709503,-0.030532837,0.007911682,-0.019989014,0.0012407303,-0.015365601,0.03338623,-0.0005393028,0.011192322,-0.0012769699,-0.015342712,-0.043060303,0.0038261414,0.061279297,-0.005756378,-0.01600647,-0.023788452,-0.011604309,0.022888184,0.028823853,-0.025222778,0.0061683655,-0.022628784,0.01108551,-0.032562256,0.00078105927,-0.008728027,0.032928467,-0.012992859,-0.045532227,-0.010917664,-0.030227661,-0.010719299,-0.06616211,-0.030731201,-0.05819702,0.016494751,0.004753113,-0.02796936,0.0078048706,0.023757935,-0.018798828,-0.087768555,0.01184082,0.032928467,0.00097322464,0.03878784,0.0063972473,0.026000977,0.028259277,-0.02394104,-0.016113281,0.015525818,-0.024536133,-0.004940033,-0.02986145,0.022918701,-0.009048462,-0.014091492,0.010574341,0.003967285,0.014320374,-0.010253906,-0.008995056,-0.02003479,0.006248474,-0.013580322,0.025238037,-0.018676758,-0.0015459061,0.04446411,-0.05908203,0.037200928,0.016433716,0.0023937225,0.007801056,0.039886475,0.047943115,-0.034301758,0.010482788,0.013343811,0.031341553,0.06518555,-0.028900146,0.023910522,0.022354126,0.0053977966,0.00023651123,-0.00066661835,0.0032787323,-0.022644043,-0.0035324097,0.025909424,-0.005874634,-0.0036125183,-0.031280518,0.008659363,0.015213013,0.02420044,0.0064048767,-0.0032730103,-0.029129028,-0.033416748,-0.0020980835,0.0031738281,-0.00022637844,-0.011451721,0.02192688,0.03387451,0.036956787,0.024673462,-0.026870728,0.005592346,0.0357666,-0.0066223145,-0.013870239,0.027557373,0.0015077591,0.021697998,0.023284912,0.0032463074,-0.032287598,-0.02420044,-0.024627686,-0.020217896,0.0013237,-0.015777588,-0.003042221,0.0045433044,0.008666992,-0.0058517456,-0.021759033,0.005680084,-0.029846191,-0.034729004,-0.01600647,-0.010848999,0.034423828,0.0012016296,-0.001288414,0.024871826,-0.010597229,0.044158936,0.0035057068,-0.019058228,0.023986816,0.040008545,0.01966858,-0.01309967,-0.0020179749,-0.011253357,-0.008773804,-0.01184845,-0.035614014,0.03149414,0.013908386,-0.007434845,0.000374794,0.0022563934,0.020401001,-0.020599365,0.0022010803,-0.013679504,0.015289307,-0.0063819885,0.053955078,-0.044189453,0.033355713,0.011360168,-0.010650635,-0.004886627,-0.0015239716,-0.02532959,0.019622803,0.0065193176,-0.0019989014,0.03894043,0.0032138824,0.03237915,-0.020523071,-0.02583313,-0.0077171326,-0.01574707,-0.032714844,-0.00022935867,-0.0049324036,-0.007160187,0.008148193,-0.020568848,0.025100708,-0.017242432,0.020141602,-0.013870239,-0.00070858,-0.010467529,-0.02520752,-0.009536743,-0.014190674,-0.008491516,0.013206482,-0.011192322,0.059539795,0.017700195,0.029510498,0.040924072,0.02861023,0.00085639954,-0.02973938,-0.03314209,0.0046310425,0.000090539455,0.008377075,-0.01751709,0.05621338,0.057373047,-0.0006866455,0.04095459,0.020401001,0.03387451,0.0039405823,0.010238647,-0.014228821,0.0051956177,-0.0025920868,0.026824951,-0.011497498,0.03086853,-0.02003479,0.028076172,0.022247314,0.030044556,-0.026901245,0.026748657,0.07550049,0.004589081,-0.021392822,0.02494812,-0.00014066696,-0.028411865,-0.016220093,-0.030532837,0.051208496,0.0074424744,0.025619507,0.06359863,0.022460938,0.014984131,0.010353088,-0.018127441,-0.009124756,0.06915283,0.016860962,-0.0054969788,-0.020614624,-0.01600647,0.009361267,-0.032196045,-0.014717102,0.0034446716,-0.03930664,0.00030064583,-0.00008535385,-0.0039024353,-0.007331848,0.01020813,0.013504028,0.029174805,-0.019866943,0.02796936,0.0206604,-0.008575439,0.016937256,-0.010108948,0.021057129,-0.029144287,-0.02796936,0.02571106,0.023925781,-0.013717651,-0.03112793,0.033233643,0.00868988,0.04727173,0.05105591,-0.025894165,0.009376526,0.031677246,-0.00018060207,-0.0082092285,0.058807373,0.025680542,0.015960693,0.04559326,0.027633667,0.033416748,-0.03277588,0.025405884,0.0013141632,-0.0020523071,-0.020339966,0.004924774,0.010696411,-0.01777649,0.044036865,-0.008308411,-0.012512207,0.009002686,0.033050537,-0.002248764,-0.006832123,-0.009803772,0.0057411194,-0.021133423,-0.0077285767,0.027359009,-0.012069702,0.02355957,-0.0014104843,0.036743164,-0.038146973,0.025100708,-0.006095886,-0.019622803,-0.019042969,0.018920898,-0.029693604,0.004966736,-0.00022089481,-0.0044784546,-0.050201416,0.014564514,0.016677856,-0.018035889,0.02494812,0.005596161,0.00039982796,-0.006095886,0.031951904,0.014076233,0.014320374,-0.011375427,-0.017211914,0.013511658,0.041046143,0.008033752,-0.0017786026,-0.01725769,-0.0017662048,-0.005794525,-0.00762558,-0.016708374,0.0034999847,-0.018295288,-0.012214661,0.006652832,0.024505615,0.0065574646,0.055847168,-0.02784729,-0.0054244995,0.011367798,0.03829956,-0.0013866425,-0.029769897,-0.008323669,0.015075684,-0.023666382,0.042663574,0.0413208,0.0045700073,0.036468506,0.006351471,-0.0098724365,-0.004688263,-0.0038871765,0.02810669,-0.014175415,0.0005097389,0.0050964355,0.020736694,-0.025634766,-0.024597168,0.0012426376,-0.017044067,-0.019073486,-0.0042877197,0.01121521,-0.0077285767,0.023635864,0.03857422,0.012237549,-0.02407837,0.058807373,-0.02217102,0.046783447,0.01285553,-0.021575928,0.047790527,0.024414062,0.046936035,0.01222229,0.024246216,-0.032226562,0.03744507,0.038726807,0.015403748,0.011924744,0.00894165,-0.014602661,0.030975342,-0.004447937,0.031585693,-0.0062942505,-0.018493652,0.027633667,-0.005306244,-0.01247406,0.0019741058,-0.009506226,-0.0062713623,0.03918457,-0.030273438,-0.0064048767,-0.024612427,-0.0077934265,0.019836426,-0.013298035,-0.0047721863,0.00014197826,-0.016815186,0.01612854,-0.016708374,-0.0070114136,0.012519836,0.03338623,-0.04196167,0.009315491,0.015357971,-0.0029754639,-0.0052871704,0.017654419,0.036193848,0.007583618,0.0014743805,0.04071045,-0.023208618,0.03878784,-0.0076522827,0.024993896,0.019805908,0.0016393661,-0.017196655,0.0046653748,0.007167816,-0.011398315,0.015319824,0.04324341,-0.031097412,0.0070648193,-0.0016183853,-0.003211975,-0.005138397,-0.010131836,-0.013656616,0.0046043396,-0.010398865,-0.024597168,0.006454468,0.012077332,-0.0062942505,0.0032024384,0.018051147,0.00070238113,0.010765076,0.028762817,0.029937744,-0.04751587,-0.00349617,0.007873535,0.0046424866,-0.015304565,-0.02229309,-0.0017786026,-0.04171753,0.0066337585,0.0034332275,0.011978149,0.015914917,-0.014038086,-0.0071144104,0.013587952,0.01158905,0.026489258,-0.009353638,0.0057678223,0.01852417,-0.022491455,0.00023674965,-0.003200531,-0.012260437,0.014816284,0.026260376,-0.0138168335,-0.026641846,0.013435364,-0.014816284,0.023605347,-0.0030288696,0.012245178,0.016403198,0.0036144257,0.0038909912,0.0013875961,0.01966858,-0.018173218,-0.018234253,0.000043034554,0.018096924,0.052978516,-0.010650635,0.0025024414,0.0151901245,0.017105103,0.019866943,0.0289917,0.015602112,0.048095703,0.027542114,-0.027999878,-0.004055023,0.018493652,-0.011390686,-0.019439697,0.01272583,-0.032440186,-0.015342712,-0.011100769,0.016998291,0.00049209595,-0.026824951,-0.0042915344,-0.008094788,-0.007095337,0.0178833,-0.01007843,0.018508911,-0.015342712,-0.006954193,0.018966675,-0.03616333,-0.032592773,-0.030410767,-0.025360107,-0.009536743,-0.061431885,0.014968872,-0.03439331,0.015434265,-0.021057129,0.0035247803,0.0013313293,0.007911682,0.0032539368,-0.01838684,0.001748085,0.026824951,0.024230957,0.016571045,0.022140503,-0.029510498,-0.02407837,-0.01826477,0.0012798309,-0.016082764,0.039916992,0.0075263977,0.02519226,0.023086548,-0.032470703,-0.01007843,-0.013473511,-0.018844604,-0.0021953583,-0.010826111,-0.019577026,0.007980347,0.0051651,0.008705139,-0.0077552795,0.049987793,-0.021606445,-0.016296387,0.02558899,0.041870117,-0.007633209,0.040008545,-0.013908386,0.0042304993,-0.016342163,-0.0000039339066,-0.016281128,0.0076904297,-0.0043678284,0.026794434,-0.0006713867,0.026611328,0.01234436,-0.012939453,0.0006804466,0.030944824,0.018478394,0.01108551,0.020690918,0.0119018555,0.016433716,-0.013183594,-0.0039634705,0.007537842,0.05130005,0.025863647,0.007911682,-0.015060425,0.0116119385,-0.02305603,0.010536194,0.02192688,-0.020965576,-0.037506104,-0.00434494,-0.03741455,0.00409317,-0.014411926,0.014640808,-0.0050849915,0.014282227,-0.015525818,-0.03375244,-0.020095825,0.026824951,0.019119263,-0.011047363,-0.01386261,0.0036506653,0.0129852295,-0.024475098,-0.006538391,-0.043518066,-0.04284668,0.013504028,-0.016540527,0.029403687,0.0011606216,-0.0061683655,-0.013015747,-0.02041626,-0.015281677,0.018478394,0.010864258,-0.007965088,0.001411438,0.020111084,0.030044556,-0.0050201416,0.024307251,-0.0023899078,0.023117065,0.016021729,-0.005126953,0.014892578,-0.010009766,0.029220581,-0.002746582,0.0064697266,0.020889282,-0.005630493,0.0135650635,-0.052459717,0.00116539,0.0055160522,-0.001420021,0.03463745,-0.017166138,-0.02961731,-0.0054740906,-0.025817871,-0.036193848,-0.008270264,0.0041236877,0.030654907,-0.010604858,0.04751587,-0.011756897,-0.010681152,0.008163452,0.015586853,-0.015510559,0.008613586,0.023895264,-0.012588501,0.0011386871,-0.0022830963,-0.014923096,-0.0019454956,-0.022720337,0.008422852,0.0013008118,-0.0011472702,0.012329102,0.02015686,0.033325195,0.010391235,0.027618408,0.0025691986,0.014564514,0.023757935,0.0055389404,0.038513184,-0.010787964,-0.018859863,-0.0043296814,-0.0018072128,-0.029464722,0.0060653687,-0.0003387928,-0.0065956116,-0.03466797,0.0063934326,0.003993988,0.024551392,-0.0076446533,0.009613037,-0.012435913,-0.009811401,-0.023086548,-0.011352539,-0.029663086,0.013374329,0.0262146,-0.006641388,0.03765869,0.0030784607,-0.015945435,0.010246277,0.0413208,-0.003320694,-0.017120361,-0.02268982,0.009262085,0.0011262894,0.008651733,0.013053894,-0.02848816,-0.019714355,0.010803223,-0.004966736,-0.0013580322,-0.0029754639,0.013298035,0.0008916855,-0.0045433044,-0.017303467,0.019714355,-0.011627197,-0.015853882,-0.0017147064,0.016143799,0.025100708,0.035461426,-0.0044288635,-0.0036468506,0.02458191,-0.037902832,0.057800293,-0.010169983,0.019317627,-0.013717651,-0.00076007843,-0.057678223,-0.017211914,-0.00945282,-0.012672424],"createdAt":"2026-04-18T19:26:44.174Z","updatedAt":"2026-04-24T05:03:16.654Z","lastSeenAt":"2026-04-24T05:03:16.654Z","tsv":"'/api':205 '/api/v1/transactions/393/receipt':180 '/docs':204 '/pricing':206 '/readme':208 '/request':17,34 '0.02':16,33,97,156 '000':93 '0x8335':66 '20':92 '2913':67 '393':51 '402':79,241 '6':102 'Base network API' 'USDC micropayment API' 'access':43 'actual':246 'advertis':108 'ai':125 'amount':90 'analysi':129 'analyt':119 'api':116,161,197 'appear':182 'avail':235 'base':9,26,61,94 'base-network' 'broader':105 'call':4,21,115 'captur':243 'categori':198 'challeng':80,242 'classif':132 'commit':169 'confirm':239 'connect':214 'content':250 'contract':65 'convers':149 'data':118,122 'decim':103 'detail':221 'document':199,230 'embed':133 'enabl':38 'endpoint':7,24,39,76,152,173,237 'estim':143 'exact':72 'exact-pay':71 'exampl':233 'exchang':138 'export':123 'extrem':201 'feed':137 'financ':134 'format':248 'gas':142 'general':195 'general-purpos':194 'generat':150 'geocod':147 'header':86 'howev':170 'i.e':96 'id':50 'infrastructur':145 'insight':124 'key':162 'learn':127 'limit':165 'list':154,175 'live':240 'lowpaymentfee' 'lowpaymentfee.com':41,106 'machin':126 'maximum':89 'metric':120 'minimum':168 'network':62 'no-api-key' 'one':191 'openapi':225 'page':209 'pay':2,19,113 'pay-per-cal':1,18,112 'pay-per-call' 'pay-per-request API' 'payload':234 'payment':56,73,85,252 'per':3,20,114,157 'platform':107 'post':54 'price':136 'prompt':216 'provid':42 'purpos':196 'quot':141 'rate':139,164 'rather':189 'receipt':6,23,47,186 'render':211 'report':121 'request':55,158 'request/response':228 'requir':81 'resourc':48,188 'respons':247 'retriev':187 'return':77 'schema':229 'scheme':74 'scope':178 'sentiment':128 'settl':12,29,58 'sinc':99 'span':117 'spars':202 'spec':226 'specif':172 'suit':110 'summar':131 'technic':220 'text':130 'token':140 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unit':95 'unknown':254 'usdc':14,31,64,98,100 'usdc-settlement' 'use':63,101 'util':146 'valid':148 'via':10,27,52 'wallet':215 'web3':135 'x':84 'x-payment':83 'x402':11,28,37,70 'x402 paid endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"9fe7405c-1664-46d4-85e4-3b23fad5a716","listingId":"c0c257b0-edcc-4678-a7b8-f0afaf8d7070","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/393/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":"2026-04-18T19:26:44.174Z"}],"sources":[{"listingId":"c0c257b0-edcc-4678-a7b8-f0afaf8d7070","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/393/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:44.174Z","lastSeenAt":"2026-04-24T05:03:16.654Z"}],"details":{"listingId":"c0c257b0-edcc-4678-a7b8-f0afaf8d7070","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/393/receipt \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/393/receipt"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/transactions/393/receipt"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 393 via programmatic payment","Demonstrating x402 payment protocol integration on the Base network","Accessing pay-per-call APIs without API key registration"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Projects requiring USDC-settled micropayment endpoints"],"notFor":["Production workloads requiring documented request/response schemas","Users needing bulk or subscription-based API access at lower per-call cost","Anyone requiring detailed API documentation or SLA guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.108Z"},"updatedAt":"2026-04-24T05:03:16.654Z"}}