{"id":"f8e1552d-e91a-43f8-b5b4-ed35c72d3b58","shortId":"Z7CG99","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","tagline":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a specific transaction receipt (transaction ID 229) behind an x402 paywall. The broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint probed (/api/v1/transactions/229/receipt) returned a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the platform's advertised pricing. Payment is made via the x402 \"exact\" scheme to the specified payTo address. The endpoint accepts POST requests and returns application/json.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, 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 usage examples available. The purpose and structure of the \"transaction receipt\" response body is unknown beyond the MIME type. The platform appears to be a demonstration or early-stage x402 API marketplace.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","transaction-receipt","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content","The specific endpoint is for a single transaction ID (229); unclear if this generalizes","Platform appears to be early-stage or a demo; reliability and longevity are uncertain"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/229/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/229/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 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this transaction receipt endpoint is unclear. 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":"2026-04-19T12:45:16.516Z","embedding":[-0.024627686,-0.032684326,0.027175903,0.009063721,0.0011367798,-0.0152282715,-0.020507812,0.028930664,0.04949951,-0.076416016,0.03137207,-0.04574585,-0.033843994,-0.025604248,-0.016403198,0.008094788,0.013473511,0.02230835,-0.059509277,0.046966553,0.035308838,-0.041625977,-0.018432617,0.011543274,-0.020874023,-0.022521973,-0.020126343,-0.0035705566,-0.048950195,-0.015655518,0.041534424,-0.019699097,-0.02230835,0.0015296936,-0.01574707,0.024932861,-0.0043678284,0.015640259,0.027542114,-0.023147583,-0.0049743652,-0.045928955,-0.0059432983,-0.007331848,-0.032684326,0.0066986084,-0.002752304,-0.016647339,0.009590149,-0.001701355,-0.048614502,-0.015281677,0.0022087097,0.026733398,0.0016918182,0.0016546249,-0.014129639,0.0058288574,0.024551392,0.007457733,-0.017471313,-0.066589355,-0.017959595,-0.016723633,0.011154175,0.054656982,-0.020095825,0.056396484,0.010597229,0.0748291,0.027038574,0.04345703,0.04989624,0.012138367,0.027389526,-0.006095886,-0.0056495667,0.034118652,-0.041381836,-0.025924683,0.003768921,-0.025665283,-0.08190918,-0.006549835,-0.012207031,-0.050079346,-0.01890564,0.00793457,-0.020217896,0.03375244,-0.06726074,0.0077056885,0.011528015,0.037078857,-0.0039405823,-0.040161133,-0.04473877,0.0022201538,-0.004676819,0.0066184998,-0.010803223,-0.03201294,0.04534912,-0.0066184998,0.046081543,0.029022217,-0.004470825,0.014373779,0.00015866756,-0.0018968582,-0.0031166077,0.016525269,0.027755737,-0.019195557,0.02720642,-0.008964539,-0.023330688,0.028915405,-0.016403198,0.035339355,-0.038909912,0.061401367,-0.0012283325,-0.006866455,0.0043258667,-0.046051025,-0.02609253,0.0104599,-0.029693604,0.006958008,0.051452637,0.019638062,-0.005947113,-0.024291992,-0.023773193,0.00063085556,-0.0056648254,-0.014602661,-0.03942871,-0.029876709,0.026275635,-0.02809143,0.01133728,0.036468506,-0.08514404,0.006286621,-0.041107178,0.017929077,-0.021636963,-0.019577026,-0.00029468536,0.0025043488,-0.017089844,-0.027252197,-0.013534546,-0.022537231,-0.005718231,0.053619385,0.0008921623,0.022232056,-0.03250122,0.031311035,0.036254883,0.023635864,0.012077332,0.019729614,0.0020179749,-0.07141113,-0.081604004,0.0018529892,0.012664795,-0.024749756,-0.04272461,0.009017944,-0.033050537,-0.09185791,-0.014007568,0.00566864,0.0038013458,-0.047058105,-0.013809204,-0.028915405,0.010131836,-0.03793335,-0.03744507,-0.02986145,-0.03967285,0.07141113,0.020645142,0.030853271,0.014022827,0.0063095093,0.03866577,0.022369385,-0.014457703,-0.02394104,0.003921509,-0.020324707,0.03668213,-0.0045776367,0.015174866,-0.022781372,0.02281189,0.076171875,-0.0077285767,-0.05368042,0.0055389404,-0.043273926,-0.028747559,-0.02545166,0.026000977,0.0053520203,-0.022064209,0.02859497,-0.04272461,0.0049972534,0.0234375,0.027618408,0.005622864,0.06124878,0.024291992,-0.0035057068,0.016098022,0.023971558,-0.036346436,0.058929443,0.031036377,0.013809204,-0.027389526,-0.060760498,0.014297485,0.03930664,-0.02394104,-0.01158905,-0.0129852295,0.028366089,-0.0009756088,-0.018325806,0.032684326,-0.0045814514,-0.029586792,-0.016342163,0.02709961,0.030349731,0.018508911,-0.022323608,-0.05065918,-0.083740234,0.07086182,0.04901123,0.016281128,-0.0009651184,-0.009513855,-0.010925293,-0.027648926,-0.08508301,0.0496521,0.06750488,-0.0038967133,-0.031921387,0.045318604,-0.016906738,-0.03741455,-0.011177063,-0.023071289,-0.021408081,-0.008621216,-0.00026512146,-0.033416748,0.017791748,-0.006290436,0.010574341,0.05508423,0.0078125,-0.059173584,-0.015792847,-0.012001038,0.010818481,-0.02859497,-0.012893677,0.010726929,0.028778076,0.020309448,0.014183044,-0.0055770874,0.0335083,0.009635925,-0.02520752,0.006591797,0.0009160042,-0.012016296,0.012771606,0.0069847107,-0.057128906,0.009353638,-0.005607605,0.053710938,-0.066101074,0.04144287,-0.02696228,-0.0052604675,0.061767578,-0.0059432983,-0.051513672,-0.0030536652,0.026916504,0.020721436,0.02268982,0.015792847,0.009918213,-0.027679443,0.056243896,-0.022491455,0.0016040802,0.0067481995,0.020355225,0.043823242,-0.00630188,-0.060516357,-0.042175293,0.012840271,-0.022583008,0.025405884,-0.022369385,0.044830322,-0.008796692,-0.0013904572,-0.033172607,-0.0024681091,-0.011177063,0.011154175,-0.01977539,0.003742218,-0.033416748,-0.029678345,0.0335083,0.007247925,-0.010978699,0.014274597,0.068359375,0.016479492,-0.007583618,-0.023956299,-0.0259552,-0.026473999,-0.014350891,0.024414062,0.00024306774,0.022109985,0.037597656,-0.03277588,0.009735107,0.020324707,-0.017929077,0.045776367,0.0006008148,0.00018179417,-0.05770874,-0.029968262,-0.017730713,-0.04360962,0.033050537,0.033050537,0.011016846,0.05307007,0.014457703,-0.02709961,-0.020217896,0.040039062,-0.039794922,0.02154541,0.042877197,-0.021530151,-0.015220642,0.0031852722,0.00630188,0.0065841675,0.043273926,0.01763916,0.018325806,0.08117676,0.026901245,0.009223938,0.025466919,0.011154175,0.025787354,-0.0047683716,-0.018081665,-0.019180298,-0.035217285,0.020462036,-0.027282715,-0.032470703,-0.06451416,0.04171753,0.04232788,0.06573486,0.024215698,0.02558899,0.029724121,0.022872925,0.018005371,0.0028705597,-0.030044556,-0.041137695,-0.01977539,0.019866943,-0.011177063,0.0012025833,-0.018859863,0.01991272,0.0053901672,0.0066719055,-0.038970947,0.035583496,-0.025100708,-0.013015747,0.017944336,0.033233643,0.04650879,0.046691895,-0.024307251,-0.002445221,0.029724121,-0.036315918,0.013046265,0.023132324,-0.009742737,-0.0038471222,-0.05255127,-0.040405273,-0.0014781952,-0.02230835,-0.0552063,-0.0047683716,0.012214661,0.02998352,0.032287598,-0.03164673,-0.03817749,0.025604248,-0.013328552,-0.031341553,0.0033683777,-0.05819702,0.019638062,0.03173828,-0.035125732,0.034942627,0.00083351135,0.0022296906,-0.022262573,0.013404846,-0.0051651,-0.01361084,-0.046905518,0.04071045,0.0018367767,0.0040130615,-0.0001988411,0.020751953,0.02609253,0.034851074,0.03378296,0.011253357,-0.02204895,-0.05834961,0.025054932,-0.035949707,-0.0027713776,0.017181396,-0.030822754,0.007411957,-0.0032863617,-0.024673462,-0.0256958,-0.0029888153,-0.02935791,0.011558533,0.016159058,-0.037902832,-0.015403748,-0.052947998,-0.03616333,-0.01776123,0.060180664,0.007949829,0.010543823,-0.054718018,-0.0066184998,0.017715454,-0.00030374527,0.004058838,-0.0149383545,-0.019989014,-0.011070251,-0.016418457,-0.038238525,-0.020599365,0.037506104,-0.005050659,-0.00995636,0.016052246,0.0063972473,0.004760742,0.015319824,-0.006839752,0.029571533,-0.0030212402,0.00030350685,-0.0007381439,0.02684021,0.0126571655,-0.038330078,-0.05392456,0.04977417,-0.021347046,0.036621094,-0.040222168,-0.011291504,0.0020275116,0.015853882,0.0035915375,-0.012367249,0.0014781952,0.0087509155,-0.02909851,-0.064453125,0.027130127,-0.013114929,0.034423828,0.020111084,0.013252258,0.040863037,-0.014060974,0.015731812,0.0074386597,-0.041259766,-0.02027893,-0.031036377,-0.045410156,-0.034942627,0.0023612976,-0.030532837,0.015571594,-0.008110046,0.010673523,-0.013679504,-0.0231781,0.0491333,-0.0018186569,0.01600647,0.010017395,0.0029888153,0.012840271,0.026412964,0.014915466,-0.053894043,0.039489746,-0.01828003,-0.001241684,-0.012466431,0.019622803,0.019012451,-0.031341553,0.012680054,-0.0154418945,0.0013942719,-0.015945435,-0.009300232,0.0052452087,0.017959595,0.022064209,-0.04437256,0.01902771,0.005077362,-0.02684021,-0.034179688,0.019165039,0.028808594,-0.033111572,0.021697998,0.031341553,0.04309082,-0.005016327,0.0041542053,0.0049591064,0.04888916,0.03665161,0.0019893646,-0.0017757416,0.025848389,-0.013244629,0.030914307,-0.0018253326,-0.0058670044,0.0046463013,0.0034885406,0.020767212,0.020614624,0.017959595,-0.010017395,-0.050201416,-0.017211914,0.006729126,-0.017654419,0.030258179,0.0060424805,0.030273438,-0.013130188,0.01550293,0.025100708,-0.033813477,-0.0075645447,-0.002494812,0.043945312,-0.0003721714,-0.0020122528,0.0118637085,0.02015686,0.023956299,-0.07067871,-0.014717102,-0.006965637,0.017990112,-0.0009393692,-0.055358887,-0.031921387,-0.017288208,0.044403076,-0.0095825195,0.009063721,0.04269409,0.010620117,0.00009775162,0.024749756,0.0039596558,0.00076150894,0.004676819,-0.04663086,-0.016326904,-0.0073928833,0.008682251,-0.032287598,0.015388489,-0.004623413,-0.014556885,0.007575989,-0.039916992,0.0035419464,-0.014701843,-0.0025367737,0.042541504,-0.007457733,0.012809753,-0.007751465,-0.032989502,0.0075302124,0.007446289,0.018371582,-0.03125,0.031829834,-0.014183044,-0.009254456,-0.017959595,0.010261536,0.018371582,0.008171082,0.010902405,0.029312134,-0.03717041,0.05014038,-0.016281128,0.012329102,0.009712219,-0.021255493,-0.023880005,-0.042510986,-0.012039185,0.031463623,-0.00057029724,-0.0026130676,-0.021911621,-0.048950195,-0.021820068,-0.055511475,0.027648926,0.015258789,0.04925537,-0.021850586,0.006591797,-0.012825012,0.017120361,0.0038013458,0.00027894974,-0.011505127,0.037139893,0.018218994,0.014282227,-0.009628296,-0.021606445,-0.023788452,0.0039901733,-0.060455322,-0.048614502,-0.008773804,0.03250122,0.0043792725,0.0016784668,-0.028274536,-0.017242432,-0.0077323914,-0.019363403,0.0078048706,-0.006511688,0.023269653,0.00274086,-0.0073051453,0.010879517,0.014663696,-0.017791748,0.027786255,0.006450653,-0.002281189,-0.036071777,0.019683838,0.0154953,0.009017944,-0.017715454,-0.026870728,0.012962341,-0.022033691,-0.045135498,0.016433716,0.0007624626,-0.015556335,-0.019851685,0.014427185,-0.045166016,-0.007522583,-0.043121338,-0.020401001,0.00869751,0.006904602,0.015838623,0.0012607574,0.0030879974,-0.0053367615,-0.0044021606,-0.04006958,0.015350342,0.010643005,0.00028657913,0.012268066,0.061706543,0.0060424805,-0.01876831,-0.008758545,-0.018753052,0.012374878,-0.023269653,0.024902344,-0.00548172,0.01576233,-0.008102417,-0.013916016,-0.037841797,0.011367798,0.055725098,-0.0013341904,-0.0023651123,-0.004714966,0.002840042,0.02268982,0.03778076,-0.036499023,0.0084991455,-0.014335632,0.021606445,-0.020446777,0.016052246,-0.00046229362,0.022888184,-0.020599365,-0.053833008,-0.0007147789,-0.01675415,0.00039458275,-0.064208984,-0.021224976,-0.044036865,0.009017944,-0.0021438599,-0.03012085,0.011390686,0.018692017,-0.025482178,-0.08117676,0.0043144226,0.054840088,-0.0010108948,0.028518677,-0.0018510818,0.022979736,0.029571533,-0.012336731,-0.020599365,0.0018262863,-0.029830933,-0.009864807,-0.026641846,0.02381897,-0.016921997,-0.019073486,0.009628296,0.012710571,0.014022827,-0.012199402,-0.010299683,-0.02684021,0.0023899078,0.005657196,0.0028381348,-0.014007568,-0.016113281,0.039520264,-0.055786133,0.043304443,0.003232956,0.0033283234,0.011932373,0.03842163,0.02798462,-0.03475952,0.00806427,0.019851685,0.018844604,0.05029297,-0.02848816,0.033355713,0.009117126,0.0069770813,-0.004673004,-0.01751709,-0.008766174,-0.022521973,-0.015556335,0.020324707,0.0077934265,-0.015602112,-0.02243042,-0.0027599335,0.011245728,0.035003662,-0.006385803,-0.016525269,-0.026657104,-0.04534912,0.009643555,0.009208679,-0.0032024384,-0.010391235,0.019821167,0.0357666,0.04031372,0.0074768066,-0.014312744,0.005832672,0.026687622,-0.007965088,-0.016784668,0.018753052,0.020690918,0.014770508,0.018997192,0.017227173,-0.041534424,-0.03173828,-0.010559082,-0.012062073,0.006664276,-0.014259338,0.008903503,0.011528015,0.0027046204,0.0013093948,-0.018493652,0.006877899,-0.03375244,-0.043273926,-0.010093689,-0.0032634735,0.025512695,0.0040283203,-0.012832642,0.013916016,-0.01626587,0.050598145,0.000259161,-0.028045654,0.018035889,0.044525146,0.0124435425,-0.02885437,0.005569458,-0.0034427643,-0.016738892,-0.0035648346,-0.018371582,0.03866577,0.007610321,-0.006389618,0.0059928894,-0.005115509,0.02609253,-0.011779785,0.016357422,-0.012542725,0.015625,-0.009284973,0.052001953,-0.051605225,0.029251099,0.023757935,-0.0060043335,0.0052719116,-0.0029258728,-0.020553589,0.029464722,0.011955261,-0.013877869,0.030960083,0.009231567,0.0395813,-0.017791748,-0.022140503,-0.011199951,-0.021209717,-0.03164673,0.004627228,-0.018829346,-0.008308411,0.0077781677,-0.023239136,0.026657104,-0.028152466,0.0071754456,-0.0040740967,-0.0053253174,-0.018600464,-0.012123108,-0.0030593872,-0.018035889,-0.02168274,0.0048332214,-0.004825592,0.06097412,0.033172607,0.014968872,0.026992798,0.026504517,0.0158844,-0.044769287,-0.03552246,-0.004638672,-0.0041999817,0.008453369,-0.016494751,0.038879395,0.053771973,-0.0059776306,0.04171753,0.022476196,0.028961182,-0.006515503,0.030914307,-0.020477295,0.015220642,-0.02456665,0.030197144,-0.009063721,0.03488159,-0.015136719,0.022399902,0.0051727295,0.019454956,-0.013786316,0.016723633,0.080200195,0.020874023,-0.012359619,0.02508545,0.002456665,-0.020980835,-0.018951416,-0.027679443,0.04208374,0.017852783,0.032836914,0.05078125,0.020828247,0.012283325,0.01499176,-0.0071105957,-0.008094788,0.046875,0.016784668,-0.0064964294,-0.020599365,-0.022506714,0.013191223,-0.039398193,-0.0011701584,-0.0025100708,-0.021881104,-0.002609253,0.0029067993,-0.004459381,-0.0015649796,0.019424438,0.006286621,0.021453857,-0.009063721,0.016357422,0.01889038,-0.0020713806,0.015945435,0.009437561,0.017593384,-0.02798462,-0.022384644,0.019195557,0.030273438,-0.0135650635,-0.020767212,0.035705566,0.010467529,0.04510498,0.033416748,-0.023345947,-0.0025634766,0.030258179,0.002943039,-0.0025749207,0.050598145,0.028884888,0.010253906,0.0413208,0.029251099,0.026184082,-0.021697998,0.019332886,-0.014083862,0.002374649,-0.023544312,0.005268097,0.016403198,-0.0009880066,0.036499023,-0.010597229,-0.0077667236,0.01789856,0.026779175,0.0047302246,-0.0067253113,-0.015174866,0.007411957,-0.015319824,-0.0055618286,0.014717102,-0.0096206665,0.022384644,0.0029144287,0.036712646,-0.040618896,0.024002075,0.0084991455,-0.030380249,-0.02381897,0.0155181885,-0.04650879,-0.0022182465,-0.0096206665,-0.017196655,-0.046875,0.001411438,0.013298035,-0.014221191,0.015174866,0.011138916,0.0026683807,-0.0093688965,0.042907715,0.0211792,-0.0073928833,-0.006324768,-0.01348114,0.010139465,0.040252686,0.0068740845,-0.020477295,-0.016433716,-0.009681702,0.006801605,-0.013290405,-0.009292603,0.008460999,-0.020080566,-0.017150879,0.02696228,0.0413208,0.0075035095,0.049591064,-0.017715454,-0.014129639,0.0046310425,0.03793335,0.0024089813,-0.024932861,-0.01576233,0.017105103,-0.019592285,0.040405273,0.033477783,0.003042221,0.03277588,0.01008606,-0.016494751,-0.00067186356,-0.0234375,0.028701782,-0.008605957,-0.0020694733,-0.009346008,0.019714355,-0.023971558,-0.032409668,-0.0028572083,-0.016708374,-0.02029419,-0.0053100586,0.01398468,-0.002325058,0.026626587,0.04168701,0.012863159,-0.014427185,0.05630493,-0.023712158,0.04043579,0.00340271,-0.009521484,0.05065918,0.024337769,0.049987793,0.0077781677,0.01259613,-0.03125,0.024993896,0.029251099,0.018127441,0.010955811,0.0029888153,-0.0067214966,0.02684021,-0.013092041,0.033996582,-0.0044174194,-0.008018494,0.023849487,-0.021240234,-0.012214661,-0.0027370453,-0.01222229,0.0038070679,0.053497314,-0.027801514,-0.0000359416,-0.024612427,-0.014877319,0.023468018,-0.012771606,-0.004180908,0.0059051514,-0.017715454,0.012428284,-0.016815186,-0.002696991,0.011474609,0.04006958,-0.0501709,-0.000026881695,0.018966675,0.007522583,-0.018096924,0.021728516,0.036468506,0.0024795532,-0.0055351257,0.03955078,-0.017089844,0.046051025,-0.0010499954,0.03375244,0.0309906,0.009376526,-0.014045715,0.017196655,0.010971069,-0.0146102905,0.012001038,0.03677368,-0.02420044,0.006713867,0.0032253265,0.0016155243,-0.0032253265,-0.0016069412,-0.018066406,0.0146102905,-0.006462097,-0.019836426,0.014678955,0.021865845,-0.0014257431,0.0022068024,0.008605957,-0.00051498413,0.011390686,0.019577026,0.028015137,-0.04260254,0.004146576,0.010757446,0.0052337646,-0.020126343,-0.020523071,-0.006801605,-0.041381836,0.0043678284,0.021072388,0.008636475,0.0071754456,-0.018920898,-0.015640259,0.026870728,0.0010385513,0.01701355,-0.00054597855,0.0011024475,0.020187378,-0.028076172,0.008071899,-0.00737381,-0.007030487,0.017456055,0.016052246,-0.024765015,-0.025131226,0.004085541,-0.0146102905,0.021636963,-0.008110046,0.012840271,0.02470398,-0.007827759,-0.0048675537,0.0025920868,0.019332886,-0.021820068,-0.016036987,-0.0107421875,0.009239197,0.053131104,-0.003709793,-0.0022144318,0.015457153,0.029907227,0.02720642,0.036010742,0.023345947,0.048675537,0.031585693,-0.023651123,-0.015655518,0.0126571655,-0.0073013306,-0.021697998,0.015686035,-0.024291992,-0.006374359,0.0020427704,0.014083862,-0.0036964417,-0.03152466,-0.004108429,-0.012107849,-0.008590698,0.016967773,-0.015808105,0.025985718,-0.02671814,-0.0030345917,0.022872925,-0.02670288,-0.029571533,-0.025283813,-0.017700195,-0.015365601,-0.055511475,0.008613586,-0.030090332,0.0101623535,-0.015335083,0.0053710938,0.008972168,0.014183044,0.007801056,-0.020812988,-0.0012598038,0.044799805,0.0047721863,0.02911377,0.017654419,-0.032470703,-0.011390686,-0.016830444,0.0046653748,-0.02809143,0.037017822,-0.008354187,0.025497437,0.008842468,-0.03894043,-0.004497528,-0.004840851,-0.024246216,-0.001660347,-0.017211914,-0.010772705,0.010688782,0.01751709,0.016082764,-0.00440979,0.039764404,-0.026275635,-0.0007710457,0.026382446,0.029693604,-0.0034160614,0.044403076,-0.014038086,0.011764526,-0.035705566,-0.003370285,-0.002752304,0.005455017,-0.008338928,0.025527954,-0.001964569,0.034118652,0.009605408,-0.018676758,0.008811951,0.03213501,0.016082764,0.009727478,0.020874023,0.0015535355,0.0102005005,-0.013679504,-0.0069503784,0.0037117004,0.05331421,0.020477295,0.0016641617,-0.0184021,0.008636475,-0.02684021,0.00548172,0.026947021,-0.022583008,-0.030639648,-0.015670776,-0.033935547,0.016784668,-0.009094238,0.016906738,0.0030117035,0.020217896,-0.005809784,-0.023483276,-0.030303955,0.025512695,0.0022640228,-0.020324707,-0.0036754608,0.0027637482,0.015945435,-0.028839111,-0.009674072,-0.04626465,-0.028549194,-0.0017213821,-0.015808105,0.030776978,0.002243042,-0.008369446,-0.010101318,-0.014419556,-0.021331787,0.019104004,0.013877869,-0.0062828064,-0.000746727,0.012763977,0.03390503,-0.013839722,0.020004272,-0.00831604,0.013641357,0.01550293,-0.005455017,0.030929565,-0.0088272095,0.022445679,0.013969421,0.008285522,0.032470703,0.003742218,0.016204834,-0.049346924,-0.0068855286,0.0048713684,-0.005470276,0.036254883,-0.004676819,-0.03579712,-0.0025501251,-0.025665283,-0.042114258,0.0033512115,0.0126571655,0.026275635,-0.010864258,0.04763794,-0.0016498566,-0.020721436,0.013298035,0.017593384,-0.026123047,0.0146102905,0.015296936,-0.017364502,0.0043563843,0.0037822723,-0.012924194,-0.00699234,-0.014823914,-0.002456665,-0.0066566467,0.0014238358,0.0009803772,0.03363037,0.03164673,0.008026123,0.02722168,0.008422852,0.011390686,0.024719238,0.009635925,0.034423828,-0.013626099,-0.02798462,-0.0027160645,-0.0020503998,-0.026473999,0.017959595,0.0078125,0.00046491623,-0.03314209,0.009262085,0.015457153,0.02078247,0.002620697,0.01727295,-0.010368347,-0.010803223,-0.017837524,0.0011749268,-0.034942627,0.0181427,0.024765015,0.010345459,0.01977539,-0.00087308884,-0.025802612,0.009117126,0.034851074,-0.011520386,-0.03564453,-0.015914917,0.010726929,-0.0055885315,0.0041160583,0.0121154785,-0.030456543,-0.018798828,-0.0027599335,-0.006454468,-0.011489868,-0.0000346303,0.016586304,0.012741089,-0.016189575,-0.016326904,0.016815186,-0.015975952,-0.012138367,0.0010356903,-0.0014295578,0.026168823,0.027679443,-0.010871887,-0.0052223206,0.028121948,-0.041168213,0.0670166,-0.017303467,0.019256592,-0.020401001,0.006919861,-0.051239014,-0.008666992,-0.0047721863,-0.010108948],"createdAt":"2026-04-18T18:59:31.176Z","updatedAt":"2026-04-24T16:03:18.376Z","lastSeenAt":"2026-04-24T16:03:18.376Z","tsv":"'/api':183 '/api/v1/transactions/229/receipt':118 '/docs':182 '/pricing':184 '/readme':186 '0.02':92,146 '000':129 '0x8335':134 '20':128 '229':42 '2913':135 '6':141 'Base network API' 'USDC micropayment API' 'accept':171 'access':34 'address':168 'advertis':51,154 'ai/ml':63 'analysi':66 'analyt':62 'api':59,104,241 'appear':231 'application/json':176 'avail':212 'base':8,22,100,130,137 'base-network' 'behind':43 'beyond':225 'bodi':222 'broader':48 'call':12,26,148 'challeng':123 'classif':68 'commit':112 'connect':192 'consist':149 'content':198 'convers':85 'crypto payment API' 'data':61,71 'decim':142 'demonstr':235 'document':177,207 'earli':238 'early-stag':237 'embed':69 'endpoint':6,20,30,88,116,170 'estim':79 'exact':162 'exampl':211 'exchang':74 'extrem':179 'feed':73 'finance/web3':70 'gas':78 'gate':3,17 'generat':86 'geocod':83 'id':41 'infer':64 'infrastructur':81 'json-response' 'key':105 'limit':108 'lowpaymentfee' 'lowpaymentfee.com':32,49 'made':158 'marketplac':242 'maxamountrequir':126 'mime':227 'minimum':111 'network':101 'no-api-key' 'openapi':202 'page':187 'paid':9,23 'pay':56 'pay-per-call API' 'pay-per-request':55 'payment':156 'payto':167 'paywal':46 'per':11,25,57,93,147 'per-cal':10,24 'per-request-pricing' 'platform':50,152,230 'post':172 'price':72,90,155 'probe':117 'prompt':194 'provid':33 'purpos':214 'quot':77 'rate':75,107 'receipt':5,19,39,220 'render':189 'request':58,94,173 'request/response':205 'requir':113 'respons':221 'return':119,175 'schema':206 'scheme':163 'sentiment':65 'settl':95 'sinc':138 'span':60 'spars':180 'spec':203 'specif':37,115 'specifi':166 'stage':239 'structur':216 'suit':53 'summar':67 'token':76 'transact':4,18,38,40,219 'transaction receipt API' 'transaction-receipt' 'translat':144 'type':228 'unit':131 'unknown':224 'usag':210 'usdc':14,28,97,133,139 'usdc-settlement' 'use':140 'util':82 'valid':84,121 'via':159 'wallet':193 'x402':2,16,45,122,161,240 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"572a4827-1712-4963-8da8-1f6a2199b788","listingId":"f8e1552d-e91a-43f8-b5b4-ed35c72d3b58","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/229/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":"2026-04-18T18:59:31.176Z"}],"sources":[{"listingId":"f8e1552d-e91a-43f8-b5b4-ed35c72d3b58","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/229/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:31.176Z","lastSeenAt":"2026-04-24T16:03:18.376Z"}],"details":{"listingId":"f8e1552d-e91a-43f8-b5b4-ed35c72d3b58","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/229/receipt \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/229/receipt"},{"claim":"Platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 229 via a single micropayment","Demonstrating x402 protocol payment flows for agent-to-API commerce","Exploring pay-per-request API access without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Testing micropayment-gated endpoint integrations"],"notFor":["Production workloads requiring documented request/response schemas","Bulk data retrieval or high-volume analytics (no documented batch support)","Users who need fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.019Z"},"updatedAt":"2026-04-24T16:03:18.376Z"}}