{"id":"8ca1b82b-bb4b-4129-be34-1ef327017243","shortId":"cjU5tY","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 an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint at `/api/v1/charges/207` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request. Payment is made via the x402 exact scheme, with a 300-second timeout window. The endpoint accepts HTTP POST and returns application/json.\n\nThe broader platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation beyond the landing page is extremely sparse; the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. No OpenAPI spec, request/response schemas, or usage examples are available from the crawled material.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","http-post","json-response"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","pay-per-call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No OpenAPI or schema documentation available — all docs/pricing/README pages render only 'Connect wallet'","The specific functionality of /api/v1/charges/207 ('Premium API Access') is not described anywhere","No request body schema or response schema is documented","No usage examples or error handling documentation found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/207","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/charges/207","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 pricing and payment details. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and no examples. The actual functionality behind 'Premium API Access' at /api/v1/charges/207 is undefined — it's unclear what data or service it returns. This is 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":"2026-04-19T03:31:36.333Z","embedding":[-0.02999878,-0.040649414,0.045806885,0.03111267,0.0056495667,-0.02229309,-0.009239197,0.01789856,0.06530762,-0.058380127,0.030334473,-0.04537964,-0.034332275,-0.023895264,-0.010154724,0.011978149,-0.0022220612,0.012825012,-0.03527832,0.03390503,0.018035889,-0.011642456,-0.022521973,0.029067993,-0.0011997223,-0.016967773,0.0045814514,-0.0029640198,-0.016464233,-0.034118652,0.03253174,-0.024887085,-0.013206482,0.011123657,-0.011062622,0.00022745132,-0.015571594,0.024612427,0.025131226,0.00066185,-0.011787415,-0.06536865,0.0115356445,-0.016052246,-0.059326172,-0.009429932,0.014183044,-0.013648987,0.005630493,0.0055007935,-0.03237915,-0.0025405884,-0.011962891,0.0069007874,0.0020141602,0.013053894,-0.0068588257,0.0051231384,0.021194458,0.016952515,-0.0044136047,-0.060943604,-0.018707275,-0.002653122,0.0015220642,0.05227661,-0.0093688965,0.0357666,-0.0026016235,0.070007324,0.033203125,0.04977417,0.035583496,0.0046539307,0.006412506,-0.0063667297,-0.011306763,0.050079346,-0.017715454,-0.02154541,-0.015182495,-0.015037537,-0.052459717,-0.00006377697,-0.019042969,-0.04727173,-0.0231781,0.03677368,-0.022964478,0.02722168,-0.06304932,-0.00007921457,-0.023864746,-0.010658264,0.004131317,0.01108551,0.000045716763,0.018371582,-0.0024909973,0.010017395,0.00084495544,-0.04171753,0.015716553,0.0115356445,0.030807495,0.046661377,0.026504517,0.019744873,-0.0031776428,-0.00014770031,-0.013084412,0.022521973,-0.021987915,-0.021331787,0.023483276,-0.002418518,-0.002243042,0.018127441,-0.042388916,0.017990112,-0.048583984,0.041137695,0.0073509216,0.0119018555,0.008529663,-0.03692627,-0.021362305,0.016342163,-0.028747559,-0.0042915344,0.012931824,0.019088745,0.025314331,-0.01864624,-0.017944336,-0.0034313202,-0.024520874,-0.018875122,-0.050872803,-0.035980225,0.043701172,-0.025848389,0.021820068,0.04711914,-0.093933105,-0.009033203,-0.047302246,0.006034851,-0.03164673,-0.01663208,-0.0035037994,0.03164673,-0.013717651,-0.014205933,-0.014663696,-0.02935791,-0.009544373,0.041778564,-0.0068588257,0.042755127,-0.023254395,0.030075073,0.015670776,-0.0011472702,0.01600647,0.025848389,-0.01234436,-0.07696533,-0.0814209,-0.030471802,-0.011627197,-0.03137207,-0.023223877,-0.010383606,0.0026607513,-0.08227539,-0.016067505,-0.019332886,0.0033626556,-0.0289917,-0.0049476624,-0.034606934,0.022033691,-0.017684937,-0.057159424,-0.01171875,-0.02507019,0.060424805,0.032226562,0.03540039,0.017990112,-0.015167236,0.06359863,0.02822876,-0.012176514,-0.011558533,0.022140503,-0.026184082,0.021560669,-0.009689331,0.016052246,-0.021377563,0.029800415,0.06890869,0.006023407,-0.025939941,-0.012496948,-0.058135986,-0.042938232,-0.03503418,0.019729614,0.01436615,-0.007408142,0.03744507,-0.03945923,-0.035736084,-0.0025234222,0.012825012,0.004737854,0.051116943,0.01927185,-0.015472412,0.02947998,0.01576233,-0.057159424,0.04034424,0.033447266,-0.0023612976,-0.0064735413,-0.031677246,0.035125732,0.020217896,-0.031982422,0.01612854,-0.02230835,0.019317627,-0.0006904602,0.009796143,0.012802124,-0.0178833,-0.03250122,-0.018829346,-0.0126571655,0.032226562,0.013252258,-0.033355713,-0.04232788,-0.092041016,0.04949951,0.030654907,0.0340271,0.0032291412,0.016799927,-0.015197754,-0.0054092407,-0.07086182,0.068603516,0.07696533,0.015716553,-0.0262146,0.019195557,-0.014297485,-0.027923584,0.00217247,-0.010910034,-0.03161621,-0.02909851,0.027999878,-0.04852295,-0.0046195984,0.020843506,0.00945282,0.04537964,-0.017303467,-0.04977417,-0.026123047,-0.008613586,0.0048332214,-0.024887085,0.00315094,-0.012008667,0.027770996,0.02355957,0.0023002625,0.008712769,-0.006587982,0.002735138,-0.010269165,-0.00021362305,-0.014518738,-0.02279663,0.004814148,-0.0037021637,-0.0569458,0.0029907227,0.008735657,0.07220459,-0.055847168,0.043792725,-0.0028438568,0.007209778,0.048797607,-0.010627747,-0.060272217,0.0059814453,0.025100708,0.021987915,0.047454834,0.023910522,-0.036132812,-0.017868042,0.075805664,-0.007167816,-0.003753662,0.021621704,0.0050849915,0.036865234,-0.0031414032,-0.06365967,-0.041748047,0.0062217712,-0.031402588,0.033599854,-0.030654907,0.03466797,-0.017944336,0.017532349,-0.022750854,0.0071640015,-0.037109375,0.0072021484,-0.007911682,0.0141067505,-0.016540527,-0.02468872,0.006652832,0.004261017,-0.02267456,0.008621216,0.030410767,0.02230835,-0.012298584,-0.032440186,-0.041931152,-0.0016384125,-0.016525269,0.014556885,0.016830444,0.02470398,0.048980713,-0.043182373,0.005279541,0.028335571,0.0029087067,0.0368042,-0.006526947,-0.00093126297,-0.06304932,-0.045288086,-0.026535034,-0.037994385,0.036590576,0.036010742,-0.007949829,0.051330566,0.010726929,-0.029846191,-0.024719238,0.025405884,-0.042938232,-0.002374649,0.03933716,-0.02558899,-0.027954102,0.0034065247,0.004940033,0.003063202,0.032989502,0.015274048,0.020492554,0.06591797,0.03451538,0.000954628,0.024353027,0.009475708,0.026626587,0.01411438,-0.026672363,-0.03152466,-0.014663696,0.028747559,-0.02444458,-0.016067505,-0.060516357,0.06793213,0.039978027,0.10180664,0.033081055,0.007827759,0.032196045,-0.022338867,0.006324768,-0.018737793,-0.024414062,-0.023254395,-0.041656494,0.03062439,-0.016143799,-0.009178162,-0.02696228,0.042938232,-0.0010557175,0.016067505,-0.033843994,0.04711914,-0.014549255,-0.020401001,0.018463135,0.01939392,0.059753418,0.072143555,-0.049438477,0.025527954,0.022109985,-0.03286743,-0.002904892,0.04244995,-0.00969696,0.00024700165,-0.056671143,-0.023910522,-0.010391235,-0.013504028,-0.047851562,0.0016365051,0.006549835,0.019165039,0.029693604,0.0067710876,-0.01727295,-0.005115509,-0.02104187,-0.051757812,-0.0052948,-0.047546387,-0.0045814514,0.036712646,-0.025100708,-0.0115737915,0.001613617,-0.012268066,-0.012374878,0.009796143,0.029434204,-0.0146102905,-0.050933838,0.04257202,-0.0008530617,0.011459351,0.009521484,0.044433594,0.035888672,0.026779175,0.039733887,0.010398865,-0.016906738,-0.060638428,0.0362854,-0.05105591,0.007671356,0.0345459,-0.018341064,-0.007385254,-0.02029419,-0.033966064,-0.025543213,0.019882202,-0.025299072,0.0024433136,0.010513306,-0.020019531,-0.02268982,-0.054504395,-0.013633728,-0.018447876,0.05731201,0.023010254,0.005744934,-0.064819336,-0.008308411,0.026672363,0.0055274963,0.025894165,-0.014152527,-0.005958557,-0.012390137,-0.04058838,0.0021018982,-0.020507812,0.023880005,-0.017349243,0.00409317,0.012634277,0.014724731,0.027114868,0.0036716461,0.0069351196,0.041656494,-0.026046753,-0.006832123,-0.01600647,0.035186768,0.015899658,0.0012016296,-0.041900635,0.038482666,0.017974854,0.029708862,-0.03656006,0.0024261475,-0.0025730133,0.018600464,0.021453857,-0.007888794,-0.0022735596,-0.011299133,-0.042816162,-0.06939697,0.039367676,-0.034118652,0.02848816,0.018814087,-0.0007929802,0.038360596,-0.019836426,0.0057258606,0.016113281,-0.030883789,-0.014274597,-0.012687683,-0.027328491,-0.017791748,-0.008621216,-0.024230957,0.02142334,-0.015548706,0.011405945,-0.010192871,-0.018157959,0.018569946,0.0074539185,-0.0039405823,0.01725769,-0.004524231,0.028182983,0.043884277,0.011550903,-0.048614502,0.020950317,-0.006298065,0.0073890686,-0.010406494,0.03994751,0.027145386,-0.0059432983,-0.015052795,-0.009117126,-0.011291504,-0.026885986,0.0056266785,0.00957489,0.009315491,0.00066423416,-0.045013428,0.0073890686,0.0022659302,-0.03286743,-0.019302368,0.018722534,0.015838623,-0.03213501,0.027526855,0.032409668,0.04824829,-0.024642944,0.005847931,-0.0012836456,0.031463623,0.037017822,0.01449585,-0.009780884,0.02357483,-0.008987427,0.018753052,-0.017303467,-0.014701843,0.016082764,0.0005092621,0.015640259,0.026260376,0.0014591217,-0.022415161,-0.029434204,0.011367798,-0.013320923,-0.030776978,0.023666382,0.01852417,0.020706177,-0.02243042,0.025238037,0.006576538,-0.019744873,-0.011695862,0.0008459091,0.04650879,-0.006252289,-0.014053345,0.015510559,0.007408142,0.029891968,-0.054504395,-0.002357483,0.004211426,0.014465332,-0.027160645,-0.05029297,-0.04043579,0.00932312,0.034240723,0.0138549805,0.027816772,0.036254883,0.0006322861,0.010421753,0.02017212,0.0012483597,-0.015327454,-0.008865356,-0.052825928,-0.016296387,-0.02230835,-0.0076942444,-0.03137207,0.016220093,-0.003528595,-0.038726807,0.0071372986,-0.01576233,-0.0022296906,-0.001824379,0.008804321,0.03967285,0.003955841,0.011497498,-0.02243042,-0.033416748,-0.0026226044,-0.0003950596,0.014572144,-0.042236328,0.007129669,-0.013946533,-0.0072402954,0.006214142,0.0118255615,0.02267456,0.023986816,0.015296936,0.032196045,-0.043762207,0.049102783,-0.032196045,0.021331787,0.004890442,-0.037139893,-0.009605408,-0.024505615,-0.0067329407,0.038970947,-0.023162842,0.00058555603,-0.021636963,-0.04046631,-0.004398346,-0.055480957,0.006980896,0.038879395,0.03717041,-0.028839111,-0.0024433136,0.0068359375,0.010063171,-0.011985779,0.010040283,-0.026748657,0.027999878,0.019866943,0.0032310486,-0.012954712,-0.020462036,-0.021621704,-0.0090789795,-0.051757812,-0.0552063,-0.017623901,0.0029354095,-0.014129639,-0.011817932,-0.01777649,-0.029281616,-0.0033226013,-0.040740967,0.016418457,0.00048828125,0.016723633,0.0015363693,-0.022506714,-0.0011968613,0.016464233,-0.020355225,0.029296875,0.011039734,-0.007583618,-0.035858154,0.0041275024,0.019561768,0.016906738,-0.005077362,-0.021469116,-0.009223938,-0.023605347,-0.061828613,0.0033302307,-0.007785797,-0.009277344,-0.011398315,0.009468079,-0.056365967,-0.0030727386,-0.021850586,0.0056610107,0.016738892,0.013893127,0.004371643,0.0027675629,0.01625061,0.00422287,-0.0051116943,-0.027374268,0.012763977,0.01071167,0.008270264,0.028411865,0.04260254,-0.0048446655,-0.02406311,0.0070991516,0.01133728,0.011512756,-0.026992798,0.0019283295,-0.026641846,0.01473999,-0.00969696,-0.008705139,-0.036590576,-0.0020484924,0.08081055,0.0003299713,-0.015258789,-0.011383057,-0.023513794,0.021011353,0.02230835,-0.043640137,-0.0075798035,-0.03427124,0.0138549805,-0.026031494,0.011543274,-0.007774353,0.02444458,-0.024749756,-0.05319214,-0.01725769,0.0005168915,-0.010986328,-0.06384277,-0.026824951,-0.062683105,0.0132751465,-0.013908386,-0.019180298,0.0011663437,0.011909485,-0.0211792,-0.07067871,0.008598328,0.049865723,0.003692627,0.027816772,-0.007369995,0.0107803345,0.028808594,-0.02670288,0.0019044876,0.019622803,-0.022155762,-0.022537231,-0.013442993,0.014587402,-0.013412476,-0.015792847,0.009292603,0.008293152,0.013450623,0.0020656586,0.013183594,-0.00566864,0.023742676,-0.011871338,0.009742737,-0.014793396,-0.0047416687,0.03186035,-0.047668457,0.026641846,0.0149383545,-0.011833191,0.00630188,0.027435303,0.046142578,-0.03869629,-0.019424438,0.010864258,-0.00069999695,0.036102295,-0.025238037,0.047668457,0.009895325,-0.016342163,0.012077332,-0.011230469,-0.018127441,-0.022079468,-0.03262329,0.02456665,0.006542206,0.009628296,-0.01689148,0.005619049,0.016662598,-0.0026226044,0.004650116,-0.010795593,-0.017074585,-0.015686035,0.007911682,-0.012023926,0.010566711,-0.005138397,0.026565552,0.023391724,0.03970337,0.0031528473,-0.008995056,-0.0025596619,0.031707764,-0.013427734,0.0007429123,0.025299072,0.01424408,0.024459839,0.015296936,0.014701843,-0.037384033,-0.018844604,-0.01777649,-0.017593384,0.005428314,-0.008682251,-0.0036697388,-0.0006260872,0.004558563,-0.018707275,-0.02130127,0.0030727386,-0.031951904,-0.02734375,0.009651184,-0.013160706,0.020935059,0.0057678223,0.009613037,0.0013246536,-0.0028686523,0.04397583,-0.002231598,-0.0154953,0.030883789,0.035736084,0.021987915,-0.029403687,-0.00907135,-0.013633728,-0.00868988,-0.00023686886,-0.031097412,0.015235901,0.050445557,-0.019683838,0.018203735,-0.0027980804,0.023468018,-0.0035552979,0.0015144348,-0.008087158,0.012626648,-0.0071640015,0.034698486,-0.05657959,0.024993896,0.012840271,0.0023822784,-0.025894165,-0.020065308,-0.019500732,0.012275696,0.011711121,-0.005168915,0.054656982,0.008926392,0.023361206,-0.016326904,-0.02420044,0.02003479,-0.029815674,-0.024475098,0.028656006,-0.0059318542,-0.0026550293,0.015777588,-0.021591187,0.027526855,-0.03753662,0.017532349,0.002746582,0.0009741783,0.00035071373,-0.015930176,-0.007293701,-0.014556885,-0.012763977,0.012779236,0.0018444061,0.041870117,0.014038086,0.04144287,0.049926758,0.027893066,0.008804321,-0.042022705,-0.01966858,-0.00035071373,-0.03363037,0.020111084,-0.005973816,0.048583984,0.027786255,0.010116577,0.030914307,0.03729248,0.03970337,0.01158905,0.020217896,-0.023742676,0.009353638,-0.0068359375,0.029891968,-0.0057258606,0.03829956,-0.035583496,0.02368164,0.013160706,0.023483276,-0.025299072,0.029922485,0.06958008,0.010986328,-0.02268982,0.050323486,-0.008979797,-0.008277893,-0.0044784546,-0.017288208,0.0524292,0.01927185,0.040283203,0.052703857,0.0084991455,-0.009399414,0.017868042,-0.03289795,-0.03062439,0.058654785,0.032470703,-0.024642944,-0.014793396,0.00242424,0.013366699,-0.04522705,-0.025543213,0.030776978,-0.0129470825,-0.0031795502,-0.016983032,-0.013076782,-0.019042969,0.013626099,0.019836426,0.016708374,-0.015975952,0.01676941,0.028045654,0.00137043,0.030685425,-0.003200531,0.021408081,-0.02154541,-0.022140503,0.022583008,0.02230835,-0.015808105,-0.012557983,0.026382446,0.008666992,0.032714844,0.0340271,-0.017791748,0.006538391,0.023223877,0.022338867,-0.008644104,0.057617188,0.04385376,0.0132369995,0.033294678,0.031707764,0.03768921,-0.038482666,0.022262573,0.0013866425,0.014038086,-0.0013217926,0.00048470497,0.0075263977,-0.010765076,0.015457153,-0.0060691833,-0.008811951,0.02268982,0.02885437,-0.012329102,-0.010879517,-0.01625061,0.004508972,-0.026351929,-0.0046691895,0.013671875,-0.024887085,0.033599854,0.011047363,0.02998352,-0.022598267,0.014556885,-0.0032176971,-0.02079773,-0.00434494,0.025299072,-0.04144287,0.005355835,-0.0015935898,-0.000259161,-0.04598999,0.008140564,0.029190063,-0.01739502,0.021850586,0.00793457,0.0021343231,-0.0072517395,0.021331787,0.00919342,0.0037441254,-0.015419006,-0.013534546,0.03152466,0.04498291,-0.009674072,-0.00065231323,-0.029174805,-0.006046295,0.008491516,-0.011497498,-0.002073288,-0.0076904297,-0.019256592,-0.020996094,0.020462036,0.03945923,0.022018433,0.053100586,-0.020492554,-0.011703491,0.015609741,0.03250122,-0.004688263,-0.0026931763,0.0007901192,0.017974854,-0.020111084,0.042663574,0.03274536,0.011001587,0.0446167,0.0006160736,-0.010253906,0.01096344,-0.013305664,0.036071777,-0.020141602,0.0023384094,-0.0026493073,0.035186768,-0.0064430237,-0.023651123,0.0057907104,-0.015419006,-0.02406311,-0.01890564,0.013496399,0.0043907166,0.02696228,0.03414917,0.03378296,-0.01739502,0.06124878,-0.0052108765,0.044067383,-0.002817154,-0.008918762,0.05316162,0.016540527,0.0385437,0.016662598,0.0076179504,-0.034332275,0.01398468,0.03237915,0.027328491,0.0069999695,0.015930176,-0.0007991791,0.037384033,-0.010047913,0.030471802,-0.007949829,-0.0047187805,0.011421204,-0.0015087128,-0.0070991516,0.001613617,-0.005619049,0.00687027,0.050567627,-0.020843506,0.0029144287,-0.032958984,-0.010055542,0.028930664,-0.013061523,0.0016517639,-0.0042686462,-0.018920898,0.00680542,-0.025421143,-0.032348633,0.0146865845,0.027923584,-0.057250977,-0.016326904,0.010253906,0.019439697,-0.02128601,0.034179688,0.030059814,0.004508972,0.00078868866,0.04611206,-0.015586853,0.022781372,-0.00667572,0.024383545,0.026275635,0.0076942444,-0.022003174,-0.006389618,0.00818634,-0.0006546974,0.019699097,0.030685425,-0.0079193115,0.004901886,-0.005695343,-0.0124053955,-0.0016222,0.006023407,-0.021148682,0.015052795,-0.0074806213,-0.012382507,0.0067710876,0.00522995,-0.0035095215,0.008323669,-0.012542725,-0.016342163,0.008598328,0.027114868,0.028579712,-0.038391113,-0.005771637,0.0020923615,0.0118637085,-0.021743774,-0.019058228,0.0018072128,-0.040893555,0.009773254,0.013717651,0.014167786,0.009429932,-0.016189575,0.00077819824,0.031341553,0.0047836304,0.018920898,-0.00046396255,-0.0082473755,0.011978149,-0.0053863525,-0.0045318604,-0.0039978027,-0.011940002,0.009223938,0.02027893,0.0025100708,-0.030517578,0.034210205,0.0009794235,0.020126343,-0.011756897,-0.013893127,0.02760315,-0.0046577454,-0.00056505203,0.0034713745,0.022476196,-0.010353088,-0.0046463013,-0.008758545,0.03466797,0.05215454,-0.00818634,-0.0050354004,0.025756836,0.026046753,0.014518738,0.042938232,0.0076904297,0.042175293,0.022842407,-0.020355225,-0.0149002075,0.02760315,-0.013015747,-0.03302002,0.015235901,-0.009544373,-0.012741089,0.017333984,0.018569946,-0.0050697327,-0.034484863,-0.013626099,-0.011871338,-0.013122559,0.014053345,-0.014854431,0.024307251,-0.021820068,-0.004753113,0.009246826,-0.034851074,-0.05206299,-0.015533447,0.005367279,-0.010322571,-0.052703857,-0.0016927719,-0.033447266,0.0015897751,-0.029006958,-0.0146102905,-0.022750854,0.012741089,-0.015312195,-0.009529114,-0.0005335808,0.018112183,0.030654907,-0.0024375916,0.018112183,-0.027069092,-0.022888184,-0.027450562,0.004611969,-0.018493652,0.020004272,0.01638794,0.03503418,0.0206604,-0.018737793,0.0016145706,-0.011253357,-0.00774765,-0.014373779,-0.02229309,-0.029846191,0.024536133,0.015388489,-0.0138168335,-0.012382507,0.033996582,-0.0287323,-0.0067863464,0.03111267,0.045440674,0.005458832,0.02067566,-0.014846802,0.0023384094,-0.018478394,0.006603241,-0.014328003,-0.0074272156,0.017166138,0.00093984604,0.0002632141,0.009155273,0.02293396,-0.013504028,-0.009681702,0.031143188,0.012542725,-0.015457153,0.036376953,0.014457703,0.005683899,-0.006881714,-0.009933472,0.025405884,0.058898926,0.0077590942,0.010543823,-0.0029964447,0.0024471283,-0.0066604614,0.015899658,0.024780273,-0.029815674,-0.04663086,-0.023117065,-0.03024292,0.019256592,0.007820129,0.01109314,-0.009170532,0.015075684,-0.031402588,-0.02999878,-0.015640259,0.03189087,0.013206482,-0.015586853,-0.012840271,0.005783081,0.006816864,-0.038085938,-0.0071105957,-0.03677368,-0.029190063,-0.0048332214,-0.016036987,0.026443481,0.013374329,-0.009300232,-0.008834839,-0.003458023,-0.0016489029,-0.005306244,0.027435303,-0.013000488,0.0010156631,0.027435303,0.02079773,-0.019226074,0.019042969,-0.01576233,0.00415802,0.0118255615,-0.012260437,0.022094727,-0.021347046,0.032928467,-0.007358551,0.002986908,0.03414917,-0.010116577,0.0115356445,-0.025863647,-0.007572174,-0.0013113022,-0.009254456,0.04031372,-0.013870239,-0.02973938,0.010292053,-0.012924194,-0.023452759,0.0017614365,0.017974854,0.032989502,-0.0063667297,0.04937744,-0.016571045,-0.008522034,0.015457153,0.00806427,-0.01689148,0.011802673,0.026611328,0.008415222,-0.00026082993,-0.0054969788,-0.0113220215,-0.03387451,-0.0031528473,0.018249512,0.0049438477,-0.018371582,0.03353882,0.012428284,0.0541687,-0.011360168,0.025726318,0.008560181,-0.00042653084,0.023742676,-0.0009627342,0.055786133,-0.009117126,-0.024810791,0.008712769,0.0016307831,-0.02796936,0.0035877228,-0.0044441223,0.0026359558,-0.040740967,0.017440796,-0.0109939575,0.02658081,-0.022262573,0.016113281,-0.024154663,-0.0007133484,-0.03414917,-0.0035324097,-0.040893555,0.017089844,0.030075073,-0.001660347,0.0335083,0.0054016113,-0.017959595,0.021942139,0.043701172,-0.0013084412,-0.030853271,-0.018966675,0.019256592,0.0034637451,0.00579834,0.011421204,-0.016723633,-0.013534546,-0.00010561943,-0.01876831,0.0066490173,-0.008117676,0.022338867,0.016998291,-0.0002772808,-0.0011606216,0.031341553,0.00053167343,-0.0060768127,0.0116119385,0.010383606,0.039733887,0.03326416,-0.018325806,0.024551392,0.013450623,-0.04046631,0.06665039,-0.002943039,0.029190063,-0.014831543,0.008644104,-0.033111572,-0.025009155,-0.014816284,0.005355835],"createdAt":"2026-04-18T18:44:31.536Z","updatedAt":"2026-04-24T16:31:48.137Z","lastSeenAt":"2026-04-24T16:31:48.137Z","tsv":"'/api/v1/charges/207':84 '/request':13,28,173 '0.02':12,27,117,172 '000':100 '0x8335':105 '20':99 '2913':106 '300':130 '402':94 '402 payment api' '6':112 'accept':136 'access':90 'across':45 'addit':146 'advertis':145 'ai/ml':48 'analysi':150 'analyt':47 'api':5,20,37,70,89,187 'application/json':141 'avail':213 'base':8,23,66,101,108 'base network api' 'beyond':178 'broader':143 'call':4,19 'challeng':95 'classif':153 'commit':78 'connect':196 'convers':165 'crawl':216 'data':46,51 'decim':113 'detail':203 'doc':186 'document':177 'embed':154 'enabl':36 'endpoint':44,56,82,135,147 'estim':162 'exact':126 'exampl':211 'exchang':157 'extrem':183 'feed':156 'finance/web3':50 'gas':161 'generat':167 'geocod':163 'howev':176 'http':137 'http-post' 'infer':49 'infrastructur':53 'json-response' 'key':71 'land':180 'limit':74 'list':86 'low payment fee' 'lowpaymentfee.com':31 'made':122 'materi':217 'micropayment api' 'minimum':77 'network':9,24,67 'no-api-key' 'offer':40 'openapi':205 'page':181,191 'paid':58 'pay':2,17 'pay-per-cal':1,16 'pay-per-call api' 'payment':120 'per':3,18,60,118 'per-request':59 'per-request-billing' 'platform':6,21,38,144 'point':175 'post':138 'premium':88 'price':155,174,188 'prompt':198 'quot':160 'rate':73,158 'readm':190 'render':193 'request':61,96,119 'request/response':207 'requir':79 'return':92,140 'schema':208 'scheme':127 'second':131 'sentiment':149 'sinc':109 'spars':184 'spec':206 'specif':81 'summar':152 'technic':202 'text':151 'timeout':132 'token':159 'translat':115 'unit':102 'usag':210 'usdc':15,30,63,104,110 'usdc api' 'usdc-base' 'use':62,111 'util':54 'valid':164 'varieti':42 'via':10,25,123 'wallet':197 'window':133 'x402':11,26,35,125 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"6a763381-8188-4b80-8233-29107902d732","listingId":"8ca1b82b-bb4b-4129-be34-1ef327017243","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/charges/207","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:31.536Z"}],"sources":[{"listingId":"8ca1b82b-bb4b-4129-be34-1ef327017243","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/207","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:31.536Z","lastSeenAt":"2026-04-24T16:31:48.137Z"}],"details":{"listingId":"8ca1b82b-bb4b-4129-be34-1ef327017243","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/207 \\\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":"The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/charges/207"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/charges/207"}],"useCases":["Accessing premium API endpoints with per-call USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need instant, keyless API access via crypto micropayments","Low-volume or sporadic API consumers who want no subscriptions or commitments"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:24.166Z"},"updatedAt":"2026-04-24T16:31:48.137Z"}}