{"id":"d2f2c0b4-b6c2-4692-a3a0-bf647706740b","shortId":"SfR3NY","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/172` is listed as \"Premium API Access\" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform advertises multiple API categories including 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\nThe specific endpoint probed here (`/api/v1/trades/172`) does not appear in the site's publicly listed API catalog, and its exact functionality is unclear — the description simply says \"Premium API Access.\" There is no OpenAPI schema, no detailed documentation, and the docs/pricing/README pages all render only a \"Connect wallet\" prompt with no further content. The endpoint accepts POST requests and returns `application/json`.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-api","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","trades API","crypto payment API"],"warnings":["The endpoint /api/v1/trades/172 is not listed in the site's public API catalog — its exact functionality is undocumented.","All documentation, pricing, and README pages render only 'Connect wallet' with no usable content.","No OpenAPI spec, no request/response schema, and no usage examples are available.","The purpose of 'trades/172' (whether it returns trade data, executes a trade, or something else) cannot be determined from available material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/172","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/172","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 schema, no documentation beyond a wallet-connect prompt, no request/response examples, and the specific endpoint /api/v1/trades/172 is not listed in the site's public catalog. Its actual functionality is 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":"2026-04-19T11:33:37.084Z","embedding":[-0.025726318,-0.028442383,0.03564453,0.016159058,0.023513794,-0.025878906,-0.029830933,0.032318115,0.072387695,-0.0592041,0.01713562,-0.037139893,-0.035980225,-0.025619507,-0.027801514,0.0028877258,0.0009379387,-0.006210327,-0.050476074,0.032836914,0.032226562,-0.019973755,-0.034454346,0.020095825,-0.0051002502,-0.008171082,-0.007598877,-0.00957489,-0.02456665,-0.032989502,0.03604126,-0.030685425,-0.009384155,0.005218506,-0.015434265,-0.022903442,0.00060272217,0.02859497,0.02796936,0.0030174255,0.009788513,-0.0690918,0.0016841888,-0.005584717,-0.055236816,-0.0033397675,0.00034952164,-0.021484375,-0.0001847744,-0.0062675476,-0.022064209,-0.0025920868,-0.011474609,0.01158905,0.008453369,0.004207611,-0.0062675476,-0.009284973,0.012268066,0.023895264,-0.008171082,-0.06866455,-0.0057029724,-0.006969452,0.0018930435,0.053375244,-0.0079574585,0.035369873,0.0066184998,0.06335449,0.022567749,0.041748047,0.037597656,0.015327454,-0.006690979,0.0006842613,-0.0129470825,0.052612305,-0.0062446594,-0.020965576,-0.012031555,-0.011795044,-0.05267334,-0.001458168,-0.023391724,-0.047180176,-0.02458191,0.014480591,-0.015327454,0.013885498,-0.08239746,-0.0074272156,0.010627747,-0.005329132,-0.0043563843,-0.016647339,-0.00844574,0.031555176,-0.012893677,0.017944336,-0.0005874634,-0.032684326,0.013458252,0.01889038,0.03378296,0.04525757,0.037994385,0.017410278,0.011680603,0.004257202,-0.036499023,0.022109985,-0.002784729,-0.009864807,0.022445679,-0.0011348724,-0.005268097,0.014656067,-0.03375244,0.028930664,-0.057556152,0.02720642,0.021484375,-0.01007843,0.00011432171,-0.039794922,-0.0087890625,0.018341064,-0.015945435,-0.0028648376,0.0137786865,0.00982666,0.033721924,0.0017566681,-0.02407837,0.0044937134,-0.014320374,-0.013587952,-0.048034668,-0.033721924,0.058258057,-0.0184021,0.023849487,0.042510986,-0.12036133,-0.012619019,-0.03515625,0.009414673,-0.026046753,-0.005554199,-0.0024032593,0.023345947,-0.019226074,-0.022994995,-0.025314331,-0.031311035,0.0025424957,0.03869629,-0.0102005005,0.045562744,-0.022964478,0.034240723,0.016815186,0.01890564,0.03237915,0.019302368,-0.0018835068,-0.07727051,-0.08294678,-0.012138367,-0.0016918182,-0.010063171,-0.035064697,0.015716553,-0.010231018,-0.074279785,-0.02722168,-0.021987915,-0.00340271,-0.04650879,-0.018371582,-0.032440186,0.018310547,-0.0044288635,-0.056732178,-0.028778076,-0.025039673,0.049743652,0.018112183,0.019927979,0.032836914,-0.020355225,0.0635376,0.022521973,-0.018997192,-0.024429321,0.015472412,-0.021942139,0.005432129,-0.0011386871,0.016906738,-0.03765869,0.031921387,0.087646484,-0.0077171326,-0.028030396,-0.0055770874,-0.061584473,-0.042510986,-0.02583313,0.019058228,0.014320374,-0.010681152,0.021133423,-0.032714844,-0.033050537,0.0128479,0.024749756,0.00881958,0.06713867,0.0018548965,-0.010536194,0.03250122,0.022720337,-0.05331421,0.036743164,0.036621094,0.007881165,-0.030426025,-0.02998352,0.024963379,0.036712646,-0.024642944,0.015357971,-0.013946533,0.022323608,-0.00548172,-0.004005432,0.0071411133,-0.018371582,-0.02607727,-0.024932861,-0.009284973,0.013000488,-0.0002734661,-0.031433105,-0.030288696,-0.075805664,0.03878784,0.041809082,0.039367676,0.0035133362,-0.008033752,-0.029968262,-0.0054092407,-0.06573486,0.061828613,0.064208984,-0.00687027,-0.012397766,0.035980225,-0.021408081,-0.022735596,-0.0047454834,-0.02859497,-0.028518677,-0.022338867,-0.0013895035,-0.0362854,-0.005290985,0.026611328,0.03125,0.044128418,-0.018814087,-0.047790527,-0.018981934,-0.010406494,0.012336731,-0.022705078,-0.0066184998,-0.002790451,0.021896362,0.009880066,0.00005477667,0.02420044,0.0038909912,-0.0036296844,-0.0053482056,0.011329651,-0.0077171326,-0.038726807,0.01953125,0.002702713,-0.058441162,-0.0069885254,-0.00655365,0.07635498,-0.05215454,0.038482666,-0.016433716,0.018371582,0.056762695,-0.007843018,-0.05609131,-0.007949829,0.016082764,0.03112793,0.043151855,0.016906738,-0.037139893,-0.027069092,0.09124756,-0.021636963,-0.008842468,0.016601562,0.016281128,0.04345703,-0.009063721,-0.05267334,-0.02619934,-0.0030155182,-0.027282715,0.020996094,-0.024597168,0.03253174,-0.021072388,0.0035800934,-0.02645874,0.004383087,-0.041625977,-0.0022182465,-0.005821228,0.0015773773,-0.022613525,-0.013885498,0.023651123,0.013305664,-0.0072135925,0.008361816,0.040618896,0.029418945,-0.006286621,-0.032836914,-0.029907227,-0.0009508133,-0.012321472,0.022277832,0.01701355,0.020980835,0.040771484,-0.030731201,0.0049324036,0.01878357,0.012001038,0.026245117,-0.01260376,0.018310547,-0.06137085,-0.038604736,-0.022766113,-0.032318115,0.037963867,0.011657715,-0.010437012,0.05807495,0.013847351,-0.015342712,-0.042388916,0.022720337,-0.055633545,-0.0060920715,0.04660034,-0.022949219,-0.035491943,0.016448975,0.0052337646,0.011062622,0.040405273,0.02923584,0.04611206,0.081848145,0.041625977,0.010955811,0.020553589,-0.014129639,0.01914978,0.009979248,-0.019592285,-0.036590576,-0.022109985,0.027389526,-0.03237915,-0.015106201,-0.070007324,0.051605225,0.047302246,0.10614014,0.021972656,-0.0004799366,0.04248047,-0.026275635,0.01953125,-0.024810791,-0.025878906,-0.02822876,-0.04663086,0.02204895,-0.0013713837,-0.021591187,-0.013870239,0.037750244,-0.011772156,0.019989014,-0.028564453,0.04776001,-0.016220093,-0.01789856,0.006160736,0.016494751,0.049224854,0.06726074,-0.0390625,0.032836914,0.03366089,-0.025299072,0.0052108765,0.04159546,-0.00869751,-0.002658844,-0.049072266,-0.021469116,-0.011482239,-0.01374054,-0.050811768,0.005596161,0.010726929,0.03274536,0.016433716,-0.008018494,-0.0024299622,-0.009819031,-0.018997192,-0.042297363,-0.011528015,-0.022827148,-0.003616333,0.050201416,-0.011665344,-0.009017944,0.00081539154,-0.0025043488,-0.0014467239,0.012557983,0.02520752,0.00522995,-0.04550171,0.029312134,0.008995056,-0.0010690689,0.01977539,0.030731201,0.029724121,0.036376953,0.042816162,0.018310547,-0.010292053,-0.06903076,0.029220581,-0.03744507,-0.0016212463,0.021011353,-0.029449463,-0.0063934326,-0.027435303,-0.021896362,-0.019592285,0.03237915,-0.033599854,0.005264282,0.026046753,-0.0004887581,-0.025375366,-0.061065674,-0.021057129,0.009140015,0.05419922,0.017578125,0.027893066,-0.0680542,-0.006729126,0.02255249,0.004676819,0.03050232,-0.014312744,-0.002872467,-0.011451721,-0.03060913,-0.014022827,-0.022583008,0.023239136,-0.010787964,-0.011650085,0.014633179,0.009407043,0.009803772,0.0042037964,0.007873535,0.029296875,-0.01260376,-0.000954628,-0.011489868,0.042297363,0.015266418,-0.0041770935,-0.05718994,0.034942627,-0.0018320084,0.03062439,-0.04046631,-0.014205933,-0.013626099,0.0045776367,0.004322052,-0.012069702,-0.008125305,-0.008003235,-0.04498291,-0.06402588,0.04547119,-0.020584106,0.022445679,0.029708862,0.012634277,0.021713257,-0.0016231537,-0.006717682,0.016052246,-0.014144897,-0.011878967,-0.020309448,-0.030944824,-0.021743774,-0.025024414,-0.020217896,0.024414062,-0.017150879,0.030059814,0.0064811707,-0.017303467,0.02218628,-0.0027217865,0.00015842915,0.0066184998,0.012016296,0.016326904,0.028717041,0.006164551,-0.052246094,0.013069153,-0.004638672,0.0012283325,0.011184692,0.04623413,0.021453857,-0.0031738281,-0.007698059,-0.009101868,-0.02772522,-0.017745972,0.003288269,0.0073661804,0.010261536,-0.006916046,-0.04397583,0.0158844,0.0049972534,-0.040863037,-0.028518677,0.024642944,0.015945435,-0.039245605,0.016098022,0.041412354,0.05328369,-0.029159546,0.003648758,-0.00818634,0.02960205,0.026550293,0.009605408,-0.0047073364,0.017196655,-0.021102905,0.013534546,-0.00035762787,-0.01889038,0.013076782,0.0056152344,0.023895264,0.018066406,0.0052719116,-0.026504517,-0.027130127,0.0008740425,-0.010421753,-0.028549194,0.03564453,0.009941101,0.03060913,-0.022964478,0.018112183,0.014480591,-0.020111084,-0.010314941,-0.021850586,0.041290283,-0.011787415,-0.017547607,0.011947632,0.0047683716,0.025299072,-0.042053223,-0.003332138,0.0047950745,-0.008552551,-0.019439697,-0.041748047,-0.025634766,0.0020065308,0.04827881,0.008621216,0.025054932,0.02357483,0.0019435883,0.006263733,0.01965332,-0.00070762634,-0.0034427643,-0.010971069,-0.040374756,-0.020065308,-0.0078125,0.0069236755,-0.019592285,0.015945435,-0.011909485,-0.015144348,0.008842468,-0.0107421875,0.00006508827,-0.015022278,0.0057640076,0.03353882,0.008407593,0.01675415,-0.015914917,-0.03753662,0.0013847351,0.004714966,0.018508911,-0.03366089,0.023590088,0.0021324158,-0.008674622,0.012435913,0.010246277,0.021820068,0.035003662,0.0030078888,0.033966064,-0.034118652,0.04647827,-0.02998352,0.0075950623,0.0040664673,-0.037353516,-0.013069153,-0.0209198,-0.016494751,0.029418945,-0.024612427,-0.004917145,-0.032165527,-0.035980225,-0.0067481995,-0.056884766,0.01386261,0.029724121,0.03250122,-0.030014038,0.0030517578,-0.0010108948,0.010429382,-0.0059280396,0.0074653625,-0.026657104,0.027618408,0.020950317,0.00024819374,-0.039154053,-0.031036377,-0.023483276,-0.00422287,-0.040527344,-0.042114258,-0.015777588,0.012168884,-0.010406494,-0.0048713684,-0.018463135,-0.033416748,0.00045681,-0.03366089,0.0052871704,0.0001360178,0.016174316,0.006126404,-0.022277832,0.0070114136,0.015457153,-0.020401001,0.03829956,0.0110321045,-0.0010643005,-0.04977417,0.01209259,0.018936157,0.029006958,-0.010673523,-0.012916565,-0.013397217,-0.02407837,-0.05419922,-0.005455017,-0.001458168,-0.01789856,-0.0113220215,-0.0048713684,-0.05105591,0.0025806427,-0.0152282715,0.00064086914,0.019699097,0.0057525635,0.008666992,0.012283325,0.019729614,0.0045928955,-0.0075950623,-0.021530151,0.015945435,0.010154724,0.0015268326,0.022155762,0.046295166,-0.0005507469,-0.021408081,-0.0015068054,0.0051498413,0.00995636,-0.01309967,0.008636475,-0.010986328,0.0149002075,-0.010787964,-0.008529663,-0.03692627,0.0016422272,0.078430176,0.0015172958,-0.014167786,-0.0146102905,-0.01663208,0.018600464,0.025115967,-0.036956787,-0.0012359619,-0.033081055,0.026809692,-0.030960083,0.016586304,-0.00491333,0.022384644,-0.021484375,-0.056365967,-0.029190063,-0.008888245,-0.017059326,-0.051513672,-0.031219482,-0.06707764,0.008651733,-0.01878357,-0.024902344,-0.0045204163,0.0000834465,-0.020996094,-0.081604004,-0.0010766983,0.04574585,0.004802704,0.03012085,-0.012420654,0.017578125,0.029571533,-0.04660034,0.0025844574,0.022216797,-0.03552246,-0.013381958,-0.023468018,0.012130737,-0.014152527,-0.021896362,0.0104904175,0.0020503998,0.017715454,-0.016647339,0.018112183,-0.009361267,0.018432617,-0.02519226,0.0259552,-0.017532349,-0.008964539,0.041809082,-0.038208008,0.021636963,0.012802124,-0.01914978,0.0075950623,0.027069092,0.03616333,-0.041137695,-0.009841919,0.024642944,0.014152527,0.035217285,-0.0206604,0.046417236,0.018218994,-0.011199951,0.0048294067,-0.01373291,-0.009963989,-0.023529053,-0.026947021,0.02746582,-0.010238647,0.018569946,-0.02709961,0.002872467,0.013496399,0.0082473755,0.005630493,-0.002418518,-0.02772522,-0.025131226,-0.0079956055,0.00040197372,-0.010536194,0.00258255,0.018005371,0.021621704,0.035614014,0.02319336,-0.013664246,0.003692627,0.029464722,-0.014389038,0.0037937164,0.023773193,0.0004720688,0.016220093,0.019256592,0.023101807,-0.049865723,-0.01423645,-0.015266418,-0.02633667,-0.007835388,-0.0024261475,-0.017547607,-0.015586853,0.009895325,-0.006362915,-0.03640747,-0.00057697296,-0.021987915,-0.02607727,-0.000013530254,-0.01940918,0.030685425,0.0012817383,0.015213013,0.003686905,-0.0050582886,0.02796936,0.009033203,-0.01625061,0.040527344,0.03262329,0.019958496,-0.025421143,-0.0028209686,-0.011482239,-0.014465332,0.0033397675,-0.03286743,0.010948181,0.038635254,-0.014709473,-0.0050697327,0.0109939575,0.02267456,-0.01033783,0.011116028,-0.0026855469,0.010246277,-0.0154800415,0.042144775,-0.036865234,0.017333984,0.016571045,-0.002090454,-0.012023926,-0.013191223,-0.03250122,0.015068054,0.012069702,-0.012161255,0.050354004,0.01361084,0.02053833,-0.014633179,-0.023391724,0.0028762817,-0.021591187,-0.023895264,0.01701355,-0.009254456,0.0006556511,0.018936157,-0.033294678,0.042999268,-0.034179688,0.015586853,0.005584717,0.0075950623,-0.006038666,-0.03137207,-0.005531311,-0.010635376,-0.0155181885,0.01965332,-0.0026836395,0.050872803,0.016784668,0.04034424,0.056152344,0.021270752,-0.0029239655,-0.040771484,-0.02671814,0.003288269,-0.010498047,0.015838623,-0.023239136,0.06008911,0.031829834,-0.0016727448,0.04510498,0.027999878,0.03164673,0.009414673,0.005519867,-0.019241333,0.025878906,-0.0020160675,0.029190063,-0.0050811768,0.034973145,-0.03213501,0.026260376,0.0057678223,0.030380249,-0.034332275,0.036865234,0.06573486,0.011634827,-0.010246277,0.041534424,-0.0001103878,-0.014823914,-0.0019874573,-0.007160187,0.053894043,0.005432129,0.044128418,0.047454834,0.018585205,0.004917145,0.021438599,-0.026031494,-0.036834717,0.053894043,0.024551392,-0.01626587,-0.012062073,-0.002002716,0.0018310547,-0.043670654,-0.01828003,0.025726318,-0.013999939,0.0071105957,0.0074653625,-0.008766174,-0.016082764,0.019470215,0.017852783,0.014984131,-0.009162903,0.0357666,0.04537964,-0.0072784424,0.02406311,-0.012573242,0.025650024,-0.024093628,-0.011116028,0.016159058,0.016326904,-0.013809204,-0.014053345,0.021072388,0.002216339,0.046783447,0.04168701,-0.017654419,0.014205933,0.032073975,0.018173218,-0.0048103333,0.0413208,0.039245605,0.013031006,0.04800415,0.024795532,0.030212402,-0.030090332,0.018249512,0.003578186,0.004173279,-0.0037555695,0.0050354004,0.012168884,-0.02255249,0.014785767,0.008018494,-0.010940552,0.025604248,0.025375366,-0.0060272217,-0.0062789917,-0.013587952,0.011123657,-0.0206604,-0.0051841736,-0.000688076,-0.015625,0.038909912,0.012527466,0.03466797,-0.019699097,0.030014038,0.0036125183,-0.012199402,-0.013061523,0.023529053,-0.035125732,0.0010910034,-0.0044174194,0.012825012,-0.055786133,0.015609741,0.031982422,-0.011390686,0.019058228,0.011833191,-0.009498596,-0.005619049,0.023727417,0.0032444,0.0049858093,-0.014503479,-0.016464233,0.03704834,0.048461914,-0.0054130554,0.0010328293,-0.016586304,-0.0024967194,0.008377075,-0.0010375977,-0.0043182373,-0.009101868,-0.019363403,-0.027542114,0.020568848,0.0368042,0.019821167,0.062805176,-0.020950317,-0.012191772,0.005268097,0.040130615,0.001663208,0.00071907043,-0.0009627342,0.008125305,-0.011734009,0.05419922,0.030136108,0.0152282715,0.041992188,0.0017585754,-0.017486572,0.0011320114,-0.0046958923,0.012763977,-0.0077667236,0.0041275024,-0.0026607513,0.024414062,-0.011436462,-0.048919678,0.0033874512,-0.01727295,-0.03062439,-0.019744873,0.007633209,0.0017852783,0.03753662,0.04397583,0.023101807,-0.02079773,0.060577393,-0.0070381165,0.041168213,-0.0026874542,-0.011474609,0.056274414,0.009269714,0.03265381,0.018585205,0.020324707,-0.032470703,0.014633179,0.037994385,0.018707275,0.017669678,-0.0021076202,-0.012802124,0.03237915,0.003156662,0.02949524,-0.014915466,0.0014152527,0.02053833,0.0042762756,-0.0066452026,-0.0045814514,-0.0016059875,0.008895874,0.05279541,-0.018920898,-0.004764557,-0.025405884,-0.0019035339,0.024398804,-0.013000488,-0.0011844635,-0.004623413,-0.016296387,0.012382507,-0.021255493,-0.02217102,0.007774353,0.025238037,-0.05697632,-0.017730713,-0.011245728,0.024429321,-0.019882202,0.036743164,0.021270752,-0.01133728,0.003255844,0.04876709,-0.007896423,0.031173706,-0.011276245,0.026794434,0.030395508,0.004634857,-0.025772095,0.003578186,-0.00044679642,-0.014984131,0.020584106,0.043029785,-0.019226074,0.007858276,-0.0068969727,-0.006389618,-0.003118515,0.0121154785,-0.015808105,0.019485474,-0.009681702,-0.008682251,0.003692627,0.00059604645,-0.0016317368,-0.0052337646,-0.0007543564,-0.026107788,0.018325806,0.035888672,0.02128601,-0.046966553,-0.009292603,0.0077552795,0.0047912598,-0.019882202,-0.0073051453,0.005748749,-0.045440674,0.01159668,0.003692627,0.016601562,0.010375977,-0.022735596,-0.0017518997,0.032287598,0.018585205,0.012237549,0.014579773,0.004901886,0.018417358,-0.009399414,-0.0022525787,-0.00015544891,-0.00003749132,0.014442444,0.013809204,-0.009857178,-0.028930664,0.021835327,-0.0042915344,0.015068054,0.0090408325,-0.014442444,0.019592285,-0.0036582947,0.0019607544,0.008666992,0.007118225,-0.009933472,0.0016088486,-0.01083374,0.035980225,0.059814453,-0.018081665,0.00041341782,0.029785156,0.008041382,0.011306763,0.03845215,-0.001285553,0.034240723,0.026763916,-0.016448975,-0.022903442,0.033050537,-0.006652832,-0.021972656,0.014762878,-0.009246826,-0.03302002,0.017654419,0.01373291,0.008300781,-0.033477783,-0.010055542,-0.017700195,-0.011741638,0.010574341,-0.015380859,-0.0024261475,-0.024490356,-0.026992798,0.009353638,-0.022872925,-0.0423584,-0.018173218,-0.0036582947,-0.0050735474,-0.051605225,-0.0023288727,-0.012916565,0.018585205,-0.026733398,-0.0045661926,0.0015974045,0.016159058,-0.010223389,-0.0112838745,0.008956909,0.021133423,0.021560669,-0.0026988983,0.034423828,-0.021118164,-0.029266357,-0.030319214,0.010437012,-0.012870789,0.015853882,0.007858276,0.023895264,0.021987915,-0.0061950684,-0.0058059692,-0.0107803345,-0.0022945404,-0.024902344,-0.019195557,-0.029052734,0.03314209,0.015701294,-0.00957489,-0.015533447,0.04260254,-0.034729004,-0.027694702,0.03262329,0.03930664,0.012626648,0.023391724,-0.023147583,0.0034942627,-0.006099701,-0.00016880035,-0.020401001,0.006134033,0.0037765503,-0.0045166016,-0.0072402954,0.004650116,0.026062012,-0.015419006,-0.005168915,0.02305603,0.0029296875,-0.008544922,0.036071777,-0.0014600754,-0.00035977364,-0.019317627,0.0012178421,0.015235901,0.048675537,0.0128479,0.005432129,-0.010551453,0.0022068024,-0.008399963,0.0031909943,0.014015198,-0.021240234,-0.049316406,-0.016311646,-0.031219482,0.01940918,0.008010864,0.017715454,-0.011886597,0.011238098,-0.011940002,-0.023803711,-0.022918701,0.0262146,0.008674622,-0.0146102905,-0.023666382,0.018325806,0.012207031,-0.047576904,-0.000936985,-0.036956787,-0.038635254,-0.0038166046,-0.025375366,0.023391724,0.012283325,0.007411957,-0.0064849854,0.0017681122,0.0015239716,0.0033912659,0.032104492,-0.012229919,-0.012466431,0.046783447,0.011253357,-0.011405945,0.026992798,-0.013496399,0.0064430237,0.006614685,-0.012786865,0.008361816,-0.0131073,0.024963379,-0.0075683594,-0.00920105,0.027023315,-0.00484848,0.011390686,-0.043640137,-0.0009899139,-0.010894775,-0.001033783,0.032409668,-0.02381897,-0.02381897,0.0110321045,-0.023208618,-0.03414917,0.0071983337,0.015396118,0.030532837,-0.005039215,0.044128418,-0.017166138,-0.0005273819,0.022384644,0.010681152,-0.01777649,-0.0035266876,0.039978027,0.0023937225,-0.0014257431,-0.0058670044,-0.014762878,-0.03829956,0.003648758,0.016448975,-0.01991272,-0.012794495,0.028640747,0.01927185,0.053588867,-0.00932312,0.027175903,0.010887146,0.016906738,0.027053833,0.009880066,0.0473938,-0.009147644,-0.020202637,0.0121154785,0.0131073,-0.028747559,0.0063095093,-0.0038394928,0.0032787323,-0.035003662,0.016662598,-0.006702423,0.033233643,-0.02458191,0.012962341,-0.024978638,0.0020332336,-0.040008545,-0.007709503,-0.022079468,0.00844574,0.030166626,0.0082473755,0.028289795,0.00028705597,-0.025222778,0.011566162,0.043395996,-0.0049362183,-0.032806396,-0.007633209,0.014411926,-0.0010051727,0.0137786865,0.0019245148,-0.019821167,-0.012527466,0.012428284,-0.010627747,0.011207581,-0.0015068054,0.02293396,0.008590698,0.0034160614,-0.010948181,0.03778076,0.0034809113,-0.010635376,0.003616333,0.0015096664,0.04248047,0.03062439,-0.011077881,0.016418457,0.01612854,-0.04638672,0.05316162,0.013397217,0.01751709,-0.019180298,-0.0036640167,-0.04296875,-0.019943237,-0.021316528,-0.0015277863],"createdAt":"2026-04-18T18:57:38.997Z","updatedAt":"2026-04-26T07:03:05.482Z","lastSeenAt":"2026-04-26T07:03:05.482Z","tsv":"'/api/v1/trades/172':56,159 '/request':13,28 '0.02':12,27,80,151 '000':74 '20':73 '402':66 'Base network API' 'USDC micropayment API' 'accept':46,209 'access':62,183 'advertis':108 'ai':120 'analysi':124 'analyt':114 'api':5,20,38,61,84,110,169,182 'appear':162 'application/json':214 'attach':93 'base':8,23,51,75 'broader':106 'call':4,19,82 'caller':91 'catalog':170 'categori':111 'challeng':67 'classif':127 'connect':200 'content':206 'convers':144 'crypto payment API' 'data':113,117 'descript':178 'detail':190 'docs/pricing/readme':194 'document':191 'embed':128 'endpoint':55,147,156,208 'estim':138 'exact':173 'exchang':133 'export':118 'feed':132 'financ':129 'function':174 'gas':137 'generat':145 'geocod':142 'header':98 'i.e':79 'includ':112 'infrastructur':140 'insight':119 'json-api' 'key':85 'learn':122 'limit':88 'list':58,168 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':121 'metric':115 'multipl':109 'network':9,24,52 'no-api-key' 'openapi':187 'page':195 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,69,97,103 'per':3,18,36,81,152 'platform':6,21,39,107 'post':210 'post-method' 'premium':60,181 'price':131,149 'probe':157 'prompt':202 'proof':104 'protocol':44 'public':167 'quot':136 'rate':87,134 'render':197 'report':116 'request':37,153,211 'requir':68,90 'return':64,213 'say':180 'schema':188 'sentiment':123 'simpli':92,179 'site':165 'specif':54,155 'summar':126 'text':125 'token':135 'trades API' 'unclear':176 'unit':76 'usdc':15,30,47,78 'usdc-base-network' 'use':41 'util':141 'valid':101,143 'via':10,25 'wallet':201 'web3':130 'x':96 'x-payment':95 'x402':11,26,43,102 'x402 API' 'x402-payment'","prices":[{"id":"449fc916-38d5-4f76-bccd-30cfd285a044","listingId":"d2f2c0b4-b6c2-4692-a3a0-bf647706740b","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/172","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:38.997Z"}],"sources":[{"listingId":"d2f2c0b4-b6c2-4692-a3a0-bf647706740b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/172","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:38.997Z","lastSeenAt":"2026-04-26T07:03:05.482Z"}],"details":{"listingId":"d2f2c0b4-b6c2-4692-a3a0-bf647706740b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/172 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/172"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/172"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The site lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing trade data or premium content behind a per-request USDC paywall","Agent-driven API consumption without pre-registration or API keys","Programmatic micropayment-gated data retrieval on Base"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.262Z"},"updatedAt":"2026-04-26T07:03:05.482Z"}}