{"id":"cac20a18-92dd-4a59-abdd-e9efe22ea800","shortId":"m3CJ8V","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/trades/135` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers endpoints across four categories: 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 priced at $0.02 per request.\n\nThis particular endpoint (`/api/v1/trades/135`) falls under a \"trades\" path that is not explicitly listed on the site's landing page among the documented API categories. Its exact functionality is unclear — the description simply says \"Premium API Access\" and no further documentation, request schema, or response schema is available. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. Callers should be aware that the actual behavior of this endpoint is undocumented beyond its x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["finance","data"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","trades API","crypto payment API"],"warnings":["The /api/v1/trades/135 endpoint is not listed among the site's publicly documented APIs — its purpose is unclear.","No request or response schema is available; callers cannot know what to send or what to expect back.","Documentation pages (/docs, /pricing, /api, /README) all render only a 'Connect wallet' prompt with no useful content.","The endpoint path includes a numeric ID (135) suggesting it may be a specific resource rather than a general-purpose API."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/135","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/trades/135","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 documentation for this specific endpoint's request/response schema, no OpenAPI spec, and the docs pages are empty. The trades/135 path is not listed among the site's advertised endpoints, making its actual functionality unknown.","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":"2026-04-19T11:39:14.626Z","embedding":[-0.020431519,-0.037994385,0.03665161,0.014328003,0.017990112,-0.012504578,-0.02168274,0.03717041,0.07922363,-0.060516357,0.018066406,-0.040618896,-0.036712646,-0.026062012,-0.020477295,0.0033073425,0.0036125183,-0.00003695488,-0.044830322,0.033050537,0.033050537,-0.0074653625,-0.03161621,0.021835327,-0.014968872,-0.018981934,-0.011878967,-0.0073623657,-0.024841309,-0.038085938,0.042510986,-0.02041626,-0.0069618225,-0.0034770966,-0.013267517,-0.028182983,0.01322937,0.03277588,0.031173706,0.0042877197,0.020401001,-0.062408447,0.0010194778,-0.010978699,-0.06561279,-0.0035114288,-0.0010690689,-0.008926392,0.0068893433,0.008270264,-0.027511597,0.0036373138,-0.025878906,0.0051002502,0.010169983,-0.0025806427,-0.006877899,-0.0067749023,0.008598328,0.020370483,-0.016571045,-0.066467285,-0.015991211,-0.0121154785,0.0060424805,0.051727295,-0.0061912537,0.037261963,0.001709938,0.05831909,0.025863647,0.044281006,0.024612427,0.015670776,-0.009208679,0.012710571,-0.013053894,0.052093506,-0.003282547,-0.014579773,-0.006340027,-0.0037269592,-0.048858643,0.008132935,-0.028915405,-0.049926758,-0.031219482,0.017318726,-0.019851685,0.01751709,-0.076171875,-0.013641357,0.013961792,-0.01083374,-0.006614685,-0.010917664,-0.00579834,0.028762817,-0.012878418,0.018066406,-0.0077285767,-0.033935547,0.018997192,0.019927979,0.043121338,0.053771973,0.030441284,0.016326904,0.0046043396,0.004173279,-0.031402588,0.022994995,0.0038471222,-0.0056152344,0.013404846,0.0064430237,-0.0077323914,0.019805908,-0.0284729,0.03857422,-0.059295654,0.026397705,0.026123047,-0.0035209656,-0.008506775,-0.040039062,-0.00029587746,0.014343262,-0.01928711,-0.011985779,0.017608643,0.0036373138,0.035247803,-0.013549805,-0.027511597,0.012069702,-0.018188477,-0.009613037,-0.058380127,-0.031311035,0.05596924,-0.011520386,0.022537231,0.0390625,-0.117126465,-0.0029010773,-0.030410767,0.007408142,-0.024841309,-0.0020656586,-0.005630493,0.024383545,-0.015281677,-0.021591187,-0.026245117,-0.031921387,0.00894165,0.028457642,-0.010948181,0.045715332,-0.029342651,0.018447876,0.016296387,0.019958496,0.030838013,0.019958496,0.016036987,-0.07519531,-0.08123779,-0.014564514,-0.0041770935,-0.00907135,-0.038360596,0.023071289,-0.00064229965,-0.075683594,-0.033599854,-0.016281128,-0.007068634,-0.043640137,-0.016815186,-0.032989502,0.022155762,-0.0025024414,-0.055389404,-0.03048706,-0.030914307,0.050445557,0.027954102,0.015686035,0.037384033,-0.009613037,0.057891846,0.01914978,-0.022094727,-0.01878357,0.015426636,-0.016952515,0.013626099,0.0014648438,0.019973755,-0.039489746,0.034820557,0.08874512,-0.0009021759,-0.019760132,-0.0021629333,-0.06726074,-0.039794922,-0.036315918,0.02017212,0.010574341,-0.0013523102,0.0345459,-0.03540039,-0.034606934,0.007320404,0.022094727,0.014045715,0.059631348,0.001709938,-0.006793976,0.03543091,0.018630981,-0.044067383,0.030838013,0.03552246,0.0014648438,-0.03265381,-0.03463745,0.026184082,0.03111267,-0.021621704,0.007537842,-0.007217407,0.01914978,-0.004585266,0.00017690659,0.012458801,-0.010902405,-0.028244019,-0.025985718,-0.005428314,0.0055770874,-0.009773254,-0.02407837,-0.036193848,-0.08355713,0.04058838,0.050354004,0.04675293,-0.014419556,-0.024536133,-0.033081055,-0.017044067,-0.06439209,0.060668945,0.065979004,-0.007411957,-0.009536743,0.034179688,-0.011222839,-0.03765869,0.0020809174,-0.031677246,-0.02319336,-0.012939453,-0.0030441284,-0.04119873,-0.0035171509,0.009963989,0.026260376,0.04586792,-0.019958496,-0.041992188,-0.022369385,-0.007381439,0.0072364807,-0.02079773,-0.0013113022,0.00063991547,0.025726318,0.012191772,-0.005153656,0.005558014,0.0028457642,-0.0030822754,0.00919342,0.010826111,-0.014633179,-0.04144287,0.004798889,0.022109985,-0.064941406,-0.0027809143,-0.002122879,0.06317139,-0.04534912,0.034179688,-0.017181396,0.011695862,0.05581665,-0.0018110275,-0.055908203,-0.005126953,0.013755798,0.03414917,0.044830322,0.0128479,-0.045562744,-0.013793945,0.093933105,-0.015625,-0.0084991455,0.01436615,0.008888245,0.051086426,-0.017456055,-0.045562744,-0.026824951,0.00030851364,-0.015258789,0.0184021,-0.02355957,0.036743164,-0.02180481,-0.0039482117,-0.024353027,0.0050239563,-0.040618896,-0.0015068054,-0.009765625,-0.0010328293,-0.02420044,-0.013687134,0.026626587,0.0059165955,-0.003818512,0.015426636,0.042816162,0.019180298,-0.010406494,-0.026992798,-0.035461426,0.0082092285,-0.00844574,0.020996094,0.021743774,0.021621704,0.050842285,-0.03048706,-0.0041046143,0.018417358,0.015792847,0.02619934,-0.013183594,0.011161804,-0.064819336,-0.040893555,-0.022079468,-0.040161133,0.025863647,0.0014476776,-0.009460449,0.055603027,0.0126953125,-0.018325806,-0.047027588,0.019058228,-0.050567627,-0.010848999,0.048065186,-0.032226562,-0.03866577,0.014251709,-0.005344391,0.0066337585,0.032104492,0.02482605,0.04144287,0.07788086,0.03866577,0.0057144165,0.030548096,-0.012802124,0.023773193,0.008651733,-0.024261475,-0.044769287,-0.02444458,0.022384644,-0.027923584,-0.020370483,-0.06390381,0.050811768,0.045043945,0.09680176,0.02583313,0.0049057007,0.035186768,-0.015777588,0.020095825,-0.02607727,-0.027770996,-0.019989014,-0.03753662,0.011001587,-0.009613037,-0.023498535,-0.013755798,0.044311523,-0.005004883,0.02658081,-0.03048706,0.05026245,-0.028656006,-0.018753052,0.0037651062,0.011817932,0.051818848,0.06585693,-0.0390625,0.033996582,0.03744507,-0.020889282,0.013381958,0.037750244,-0.010482788,0.0027198792,-0.05255127,-0.023132324,0.002357483,-0.010696411,-0.048339844,0.013885498,0.009803772,0.024597168,0.019943237,-0.0051498413,-0.00258255,-0.006652832,-0.013252258,-0.039154053,-0.0021305084,-0.01687622,0.009750366,0.050750732,-0.012313843,-0.009277344,0.0031738281,-0.009880066,0.005886078,0.005329132,0.022216797,0.008628845,-0.052642822,0.02897644,0.008796692,0.007419586,0.034057617,0.028427124,0.015586853,0.037384033,0.04815674,0.012763977,-0.008018494,-0.071777344,0.014122009,-0.03616333,0.007457733,0.022628784,-0.03314209,0.0020809174,-0.017791748,-0.020751953,-0.022369385,0.024246216,-0.03265381,0.005592346,0.020965576,-0.004634857,-0.026184082,-0.04748535,-0.01889038,0.010375977,0.05126953,0.019683838,0.029449463,-0.06652832,-0.013587952,0.026351929,0.0036945343,0.035827637,-0.014762878,-0.0038433075,-0.011856079,-0.02861023,-0.016815186,-0.024414062,0.020568848,-0.011451721,-0.00007534027,0.017578125,0.01701355,0.012588501,0.006023407,0.008705139,0.030960083,-0.025680542,0.0028018951,-0.009994507,0.030380249,0.017959595,-0.0073013306,-0.055267334,0.019699097,-0.0012073517,0.036712646,-0.03704834,-0.0124053955,-0.010826111,0.0046539307,-0.0004813671,-0.016220093,-0.0011167526,-0.015548706,-0.053619385,-0.06964111,0.047302246,-0.021347046,0.023773193,0.028320312,0.00014722347,0.02571106,-0.0054626465,-0.0068206787,0.009185791,-0.015602112,-0.010269165,-0.016189575,-0.032073975,-0.022094727,-0.01939392,-0.016082764,0.026641846,-0.016647339,0.025726318,0.0058631897,-0.016845703,0.032196045,0.0016098022,-0.005027771,0.006980896,0.009361267,0.011543274,0.028167725,0.0073013306,-0.054901123,0.021270752,-0.009605408,0.013183594,0.0013504028,0.04953003,0.024169922,-0.0046958923,-0.0056266785,-0.009590149,-0.027175903,-0.017288208,0.001499176,0.006614685,0.0116119385,-0.003370285,-0.041900635,0.018737793,-0.0051651,-0.02909851,-0.025924683,0.013374329,0.020187378,-0.037231445,0.02053833,0.030807495,0.053375244,-0.024993896,0.01071167,-0.020324707,0.028762817,0.02722168,0.00932312,-0.014801025,0.014984131,-0.029464722,0.022567749,-0.0023002625,-0.010978699,0.016052246,-0.0004930496,0.028503418,0.018692017,0.004714966,-0.028945923,-0.026153564,-0.006713867,-0.006690979,-0.023834229,0.027008057,0.019683838,0.026275635,-0.02696228,0.019607544,0.020645142,-0.014183044,-0.0132751465,-0.028945923,0.0362854,-0.0066452026,-0.017990112,0.010292053,0.004535675,0.023895264,-0.0435791,-0.004257202,0.0075950623,-0.0072364807,-0.012123108,-0.04019165,-0.024353027,0.004486084,0.051513672,0.007091522,0.02394104,0.029190063,0.011909485,0.007820129,0.020553589,-0.0070724487,-0.022918701,-0.011909485,-0.04168701,-0.022064209,-0.017044067,0.0027122498,-0.020965576,0.012268066,-0.0076560974,-0.015533447,0.0034618378,-0.0057792664,0.00082683563,-0.013519287,0.0058517456,0.030303955,0.0032215118,0.023880005,-0.012748718,-0.038269043,0.0026245117,0.00166893,0.011123657,-0.024841309,0.022583008,0.0005297661,-0.020645142,0.01889038,0.0067214966,0.025543213,0.023635864,0.0023422241,0.040283203,-0.04675293,0.05050659,-0.02897644,0.014137268,0.0001860857,-0.037200928,-0.01966858,-0.020874023,-0.013084412,0.03161621,-0.02645874,-0.016601562,-0.031799316,-0.043304443,-0.007881165,-0.062194824,0.019546509,0.03250122,0.032989502,-0.02507019,-0.002609253,-0.0041236877,0.007041931,-0.008766174,0.014915466,-0.024383545,0.032409668,0.029937744,-0.00002527237,-0.039398193,-0.037475586,-0.030044556,-0.0082092285,-0.04623413,-0.04385376,-0.01878357,0.01927185,-0.0047187805,-0.0068511963,-0.01007843,-0.030227661,-0.0010194778,-0.03829956,0.0008497238,0.0076675415,0.019989014,0.0055732727,-0.023162842,0.0054855347,0.023162842,-0.016571045,0.037628174,0.007926941,-0.00072813034,-0.048706055,0.014289856,0.025634766,0.029678345,-0.0034160614,-0.002002716,-0.0107421875,-0.022705078,-0.049316406,-0.0058135986,0.0018863678,-0.022888184,-0.012260437,-0.0048561096,-0.04547119,0.0010662079,-0.0140686035,0.00007504225,0.015853882,0.0082092285,0.017852783,0.008506775,0.016494751,0.0032958984,-0.0032310486,-0.027008057,0.018875122,0.0107421875,-0.008094788,0.01927185,0.05706787,-0.0032405853,-0.023254395,-0.0038375854,0.000849247,0.006385803,-0.011001587,0.0061798096,-0.017364502,0.016662598,-0.016860962,-0.014984131,-0.0423584,0.00016331673,0.0814209,-0.0039596558,-0.030807495,-0.011009216,-0.012794495,0.017410278,0.024856567,-0.039276123,0.0047721863,-0.027435303,0.02104187,-0.025390625,0.01965332,-0.0018987656,0.013687134,-0.018295288,-0.048614502,-0.02420044,-0.010467529,-0.022735596,-0.052520752,-0.036468506,-0.06744385,0.0033512115,-0.024429321,-0.032989502,-0.0043754578,0.00047683716,-0.017410278,-0.084228516,0.0053367615,0.047424316,0.008049011,0.029815674,-0.016571045,0.0119018555,0.029678345,-0.04812622,-0.00806427,0.019348145,-0.031097412,-0.014137268,-0.024169922,0.01184082,-0.012519836,-0.014579773,0.010475159,-0.0005927086,0.016952515,-0.016342163,0.015930176,-0.012870789,0.014213562,-0.03253174,0.016586304,-0.016296387,-0.012306213,0.0446167,-0.046447754,0.021347046,0.014656067,-0.022872925,0.0018596649,0.02293396,0.038085938,-0.035583496,-0.015792847,0.014328003,0.016723633,0.02973938,-0.020828247,0.05407715,0.020599365,-0.018478394,0.010574341,-0.013061523,-0.0014972687,-0.025146484,-0.023727417,0.025146484,-0.013046265,0.021087646,-0.031341553,-0.0015296936,0.00907135,0.009773254,0.010917664,-0.0079574585,-0.028869629,-0.030288696,-0.007160187,0.004875183,-0.00894165,0.007987976,0.021560669,0.019836426,0.02748108,0.018981934,-0.01676941,0.012062073,0.026489258,-0.012817383,0.00039625168,0.023040771,-0.0064315796,0.013137817,0.025375366,0.021026611,-0.04458618,-0.014213562,-0.01940918,-0.021652222,0.0008611679,-0.0035533905,-0.013320923,-0.019454956,0.017593384,-0.006298065,-0.03781128,-0.0033359528,-0.018692017,-0.02709961,0.00006866455,-0.018295288,0.020492554,0.012939453,0.005908966,0.007434845,-0.008956909,0.018508911,0.0018596649,-0.017181396,0.0309906,0.02861023,0.015144348,-0.035064697,0.006084442,-0.011703491,-0.015914917,0.00017976761,-0.03277588,0.010299683,0.04119873,-0.014411926,-0.005142212,-0.0005698204,0.017456055,-0.013298035,0.013771057,0.0032844543,0.014907837,-0.0158844,0.03427124,-0.029632568,0.020874023,0.013458252,-0.00017249584,-0.014091492,-0.008476257,-0.034118652,0.018615723,0.008514404,-0.018707275,0.05090332,0.019851685,0.028869629,-0.01878357,-0.015365601,0.00092840195,-0.009086609,-0.022384644,0.02696228,-0.016693115,0.0013561249,0.014633179,-0.034240723,0.04348755,-0.037353516,0.015426636,-0.0024299622,0.006954193,-0.00774765,-0.03036499,-0.004627228,-0.014961243,-0.016494751,0.01727295,-0.0023403168,0.055908203,0.026641846,0.04196167,0.05847168,0.021942139,-0.004760742,-0.036346436,-0.02583313,0.012084961,-0.009140015,0.01612854,-0.02507019,0.054016113,0.03262329,-0.0024089813,0.042053223,0.028869629,0.02243042,0.005897522,0.005874634,-0.019088745,0.019104004,-0.0027389526,0.028656006,0.0010070801,0.027816772,-0.034301758,0.02658081,0.008712769,0.030151367,-0.0335083,0.038116455,0.068115234,0.012199402,-0.012832642,0.049194336,0.000667572,-0.0154418945,0.0050735474,-0.016494751,0.04711914,0.0027503967,0.04864502,0.04714966,0.010482788,0.0013723373,0.012069702,-0.027175903,-0.03552246,0.057678223,0.016616821,-0.023864746,-0.01612854,0.0010938644,0.011962891,-0.03555298,-0.01676941,0.019348145,-0.015129089,0.009635925,-0.0039520264,-0.009742737,-0.020141602,0.016937256,0.026824951,0.009132385,-0.018844604,0.034454346,0.04208374,-0.003227234,0.018692017,-0.009552002,0.022338867,-0.028320312,-0.013549805,0.019165039,0.016601562,-0.01374054,-0.0058403015,0.01828003,0.01348114,0.041900635,0.047821045,-0.023040771,0.006954193,0.03164673,0.016540527,-0.013587952,0.041107178,0.028823853,0.003156662,0.049682617,0.024475098,0.038635254,-0.032592773,0.02268982,-0.0082473755,0.009765625,-0.007675171,-0.000056564808,0.0096588135,-0.019500732,0.011947632,0.002960205,-0.011054993,0.02154541,0.028427124,-0.0040740967,0.00059986115,-0.012313843,0.009597778,-0.018005371,-0.0026054382,-0.0101623535,-0.007408142,0.04119873,0.009017944,0.033721924,-0.016952515,0.03237915,0.008270264,-0.014213562,-0.008216858,0.017532349,-0.035827637,0.0010766983,-0.0030212402,0.005355835,-0.05331421,0.018707275,0.023773193,-0.003967285,0.027297974,0.00932312,-0.010025024,-0.0095825195,0.027557373,0.004627228,0.003818512,-0.016067505,-0.017501831,0.03616333,0.050598145,-0.00932312,0.00074625015,-0.018997192,-0.0061302185,0.011352539,0.0005145073,-0.009979248,-0.0069084167,-0.015945435,-0.026855469,0.020889282,0.036102295,0.024780273,0.062194824,-0.019805908,-0.015350342,-0.0018320084,0.040527344,0.0013189316,-0.0007967949,0.0020828247,0.008026123,-0.009719849,0.05279541,0.027740479,0.016067505,0.04434204,-0.0022335052,-0.013191223,0.0062828064,-0.008621216,0.012214661,-0.005584717,0.003534317,-0.005973816,0.024490356,-0.018234253,-0.04547119,0.0074386597,-0.020065308,-0.021591187,-0.01966858,0.005718231,-0.0013418198,0.037017822,0.03302002,0.022064209,-0.022644043,0.06365967,-0.007347107,0.04360962,0.00009083748,-0.019317627,0.04937744,0.008483887,0.037750244,0.018569946,0.018966675,-0.03967285,0.022644043,0.03427124,0.023391724,0.010665894,0.0011482239,-0.014762878,0.030883789,0.004673004,0.02798462,-0.007484436,-0.00045967102,0.029571533,-0.004547119,-0.0029525757,-0.0013656616,-0.004722595,0.007472992,0.047454834,-0.02003479,-0.010574341,-0.02748108,-0.0008111,0.014801025,-0.016738892,0.004585266,0.0007100105,-0.014877319,0.02319336,-0.018127441,-0.021026611,0.011169434,0.020965576,-0.05569458,-0.023803711,-0.006591797,0.02722168,-0.012763977,0.027557373,0.020553589,-0.011917114,0.00083589554,0.053710938,-0.007434845,0.021850586,-0.0115737915,0.029708862,0.027694702,0.008354187,-0.020263672,0.011169434,0.0071907043,-0.0079193115,0.025558472,0.04812622,-0.017181396,0.011642456,-0.006778717,-0.0065231323,0.0033435822,0.007835388,-0.018798828,0.013587952,-0.010536194,-0.004047394,0.0048332214,-0.0032539368,-0.007621765,-0.007572174,0.0049095154,-0.019683838,0.014671326,0.04031372,0.013168335,-0.041656494,-0.009094238,0.0053482056,0.008277893,-0.02281189,-0.0063438416,0.0056762695,-0.041381836,0.011856079,0.0068969727,0.017440796,0.0082473755,-0.020401001,0.000025212765,0.036102295,0.018249512,0.013664246,0.013626099,0.011695862,0.019195557,-0.018112183,-0.0060806274,-0.0017051697,0.0014362335,0.010604858,0.014892578,-0.0061836243,-0.028823853,0.014228821,-0.003435135,0.014328003,0.0059318542,-0.014640808,0.016189575,-0.008079529,0.007896423,0.005355835,0.0079193115,-0.005264282,0.0035991669,-0.0064888,0.035736084,0.05429077,-0.01751709,-0.005138397,0.03149414,0.0027923584,0.012191772,0.04196167,0.006793976,0.03164673,0.023345947,-0.018173218,-0.02558899,0.039123535,-0.015182495,-0.027282715,0.009902954,-0.007297516,-0.029281616,0.015853882,0.018692017,0.0054092407,-0.033691406,-0.0124435425,-0.014640808,-0.008796692,0.01234436,-0.01399231,-0.0018796921,-0.024414062,-0.022216797,0.0071983337,-0.021377563,-0.03866577,-0.021972656,-0.007949829,-0.008903503,-0.050964355,-0.0067329407,-0.013847351,0.021331787,-0.027542114,-0.0013332367,-0.00088739395,0.019424438,-0.00737381,-0.009346008,0.014892578,0.018615723,0.016494751,-0.001619339,0.032348633,-0.01763916,-0.031219482,-0.032440186,0.0043296814,-0.016860962,0.027908325,0.009513855,0.01586914,0.023635864,-0.002828598,-0.017974854,-0.008277893,0.0009355545,-0.02053833,-0.024169922,-0.025817871,0.023376465,0.018936157,-0.010437012,-0.012077332,0.04083252,-0.02722168,-0.021850586,0.03363037,0.037872314,0.008087158,0.028900146,-0.029418945,0.00049352646,-0.009933472,0.0013008118,-0.022766113,-0.0019254684,0.00050735474,0.003686905,-0.010498047,-0.0013790131,0.025009155,-0.013084412,-0.0021877289,0.019058228,0.0033988953,-0.008651733,0.03012085,-0.0018014908,0.0022716522,-0.011917114,0.006416321,0.016998291,0.05722046,0.013954163,0.0015668869,-0.012649536,0.009544373,-0.008018494,0.0037269592,0.01600647,-0.019546509,-0.04724121,-0.0110321045,-0.031341553,0.027801514,0.012794495,0.02029419,-0.015167236,0.00459671,-0.008682251,-0.02293396,-0.021636963,0.020599365,0.011024475,-0.015281677,-0.0154418945,0.016311646,0.01889038,-0.040863037,-0.0050735474,-0.03390503,-0.039489746,-0.007457733,-0.025802612,0.026290894,0.01109314,0.002521515,0.0010652542,-0.0082473755,-0.0014162064,0.0044403076,0.030654907,-0.012634277,-0.019058228,0.039794922,0.022857666,-0.0059165955,0.025909424,-0.012001038,0.006034851,-0.0009822845,-0.008125305,0.01121521,-0.01777649,0.020736694,-0.010910034,-0.010421753,0.024917603,-0.0025405884,0.010894775,-0.04675293,0.0008678436,-0.014122009,-0.007904053,0.03375244,-0.024261475,-0.023376465,0.004989624,-0.022583008,-0.03375244,0.004432678,0.011894226,0.024124146,0.0024585724,0.045776367,-0.021209717,0.0004892349,0.022033691,0.010131836,-0.021652222,-0.0066375732,0.040161133,0.002735138,0.005340576,-0.0039482117,-0.015235901,-0.0317688,0.0069084167,0.02279663,-0.017959595,-0.008934021,0.02305603,0.021606445,0.040374756,-0.015808105,0.022872925,0.009887695,0.020950317,0.03189087,0.003566742,0.050231934,-0.011627197,-0.019485474,0.013252258,0.006126404,-0.02835083,0.0015296936,-0.0041236877,-0.00033521652,-0.03048706,0.018798828,-0.008041382,0.026809692,-0.01979065,0.01008606,-0.029281616,-0.004989624,-0.03579712,-0.009300232,-0.02494812,0.00674057,0.034088135,0.006454468,0.030227661,0.0038433075,-0.030441284,0.014160156,0.043640137,-0.003967285,-0.030914307,-0.010574341,0.01676941,-0.0048103333,0.018585205,0.0031700134,-0.01789856,-0.02407837,0.0132751465,-0.011642456,0.01184845,-0.0029067993,0.028793335,0.013076782,-0.003112793,-0.0061912537,0.036956787,0.002878189,-0.005794525,0.0025997162,0.0042686462,0.044036865,0.0309906,-0.0047721863,0.019104004,0.013809204,-0.039886475,0.05999756,0.019317627,0.019866943,-0.018692017,-0.0017719269,-0.045013428,-0.015731812,-0.018600464,0.006175995],"createdAt":"2026-04-18T18:57:45.015Z","updatedAt":"2026-04-26T05:32:45.791Z","lastSeenAt":"2026-04-26T05:32:45.791Z","tsv":"'/api/v1/trades/135':56,159 '/request':13,28 '0.02':12,27,78,153 '000':72 '20':71 '402':66 'Base network API' 'USDC pay-per-call' 'accept':46 'access':62,92,192 'across':112 'actual':227 'addit':219 'advertis':83 'ai':122 'among':176 'analysi':126 'analyt':116 'api':5,20,38,61,85,179,191,208 'attach':95 'avail':203 'awar':224 'base':8,23,51,73 'behavior':228 'beyond':234 'broader':108 'call':4,19,80 'caller':93,221 'categori':114,180 'challeng':67,237 'classif':129 'connect':214 'content':220 'convers':146 'crypto payment API' 'data':115,119 'descript':187 'doc':205 'document':178,196 'embed':130 'endpoint':55,111,149,158,231 'estim':140 'exact':182 'exchang':135 'explicit':168 'export':120 'fall':160 'feed':134 'financ':131 'four':113 'function':183 'gas':139 'generat':147 'geocod':144 'header':100 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'json-response' 'key':86 'land':174 'learn':124 'limit':89 'list':58,169 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'metadata':238 'metric':117 'micropayment API' 'network':9,24,52 'no-api-key' 'offer':110 'page':175,209 'particular':157 'path':164 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,99,105 'per':3,18,36,79,154 'platform':6,21,39,82,109 'post-method' 'premium':60,190 'price':133,151,206 'prompt':216 'proof':106 'protocol':44 'quot':138 'rate':88,136 'render':211 'report':118 'request':37,68,155,197 'respons':200 'return':64 'say':189 'schema':198,201 'sentiment':125 'simpli':94,188 'site':172 'specif':54 'summar':128 'text':127 'token':137 'trade':163 'trades API' 'unclear':185 'undocu':233 'unit':74 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':215 'web3':132 'x':98 'x-payment':97 'x402':11,26,43,104,236 'x402 API' 'x402-payment'","prices":[{"id":"a3a6f0e4-4b88-4454-aa9d-6db25b6cf95f","listingId":"cac20a18-92dd-4a59-abdd-e9efe22ea800","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/trades/135","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:45.015Z"}],"sources":[{"listingId":"cac20a18-92dd-4a59-abdd-e9efe22ea800","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/135","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:45.015Z","lastSeenAt":"2026-04-26T05:32:45.791Z"}],"details":{"listingId":"cac20a18-92dd-4a59-abdd-e9efe22ea800","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/135 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/135"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/135"},{"claim":"The site offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing trade data or premium content behind a per-call USDC micropayment","Integrating pay-per-use API calls into autonomous agents on Base network","Testing x402 protocol payment flows with low-cost endpoints"],"bestFor":["Developers experimenting with x402 protocol integrations","Agents that need keyless, pay-per-call API access settled in USDC on Base","Low-volume consumers who prefer per-request pricing over subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume production workloads where $0.02/request adds up significantly","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.968Z"},"updatedAt":"2026-04-26T05:32:45.791Z"}}