{"id":"a55c3144-fc73-4392-832a-3260096f9d43","shortId":"qtjRBn","kind":"x402","title":"Pay-per-request premium API access via x402 on Base network at $0.02/call in USDC.","tagline":"Pay-per-request premium API access via x402 on Base network at $0.02/call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/collections/7` accepts POST requests and charges 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02 per request (USDC uses 6 decimals). Payment is settled on-chain on Base.\n\nThe broader lowpaymentfee.com platform offers a suite of APIs across 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 (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific functionality of the `/api/v1/collections/7` endpoint is not documented beyond the label \"Premium API Access.\" The output schema indicates it accepts HTTP POST and is discoverable, but no request/response body schemas are provided. The docs, pricing, and API pages on the site appear to require wallet connection and do not expose further documentation.","tags":[],"capabilities":["x402-payment","per-request-billing","base-network","usdc-settlement","no-api-key","no-rate-limits","http-post"],"categories":["api-marketplace","crypto"],"synonyms":["pay-per-call API","x402 endpoint","micropayment API","USDC API access","Base network API","lowpaymentfee","402 payment protocol"],"warnings":["No request or response schema documented for this specific endpoint","The exact functionality of /api/v1/collections/7 is unclear — 'Premium API Access' is a generic label","Documentation pages require wallet connection and provide no readable content","Cannot verify what data or service is delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/7","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/collections/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually returns, no request/response schemas, and the specific purpose of '/api/v1/collections/7' is unknown beyond the generic label 'Premium API Access'.","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":"2026-04-19T18:05:46.714Z","embedding":[-0.017791748,-0.03704834,0.053955078,0.014289856,0.012969971,-0.03125,-0.032348633,0.03488159,0.05987549,-0.07849121,0.019424438,-0.043029785,-0.027709961,-0.028137207,-0.009811401,0.0074005127,0.021530151,-0.003168106,-0.0335083,0.04421997,0.025131226,-0.005466461,-0.015533447,0.015609741,0.0046081543,0.0017414093,-0.009315491,-0.009048462,-0.016616821,-0.045928955,0.032043457,-0.024017334,0.008087158,0.030792236,-0.028717041,-0.0027065277,-0.010505676,0.057556152,0.03704834,0.0029678345,-0.0031776428,-0.06323242,0.016784668,-0.009552002,-0.041015625,-0.0065193176,0.02670288,-0.03756714,-0.014892578,0.013221741,-0.0357666,0.00062179565,-0.012710571,-0.00089740753,0.030670166,-0.006462097,0.0000104904175,-0.0029640198,0.0050468445,0.0116119385,0.00073957443,-0.056793213,-0.014984131,0.0018014908,-0.0015697479,0.057403564,-0.016174316,0.04336548,0.01007843,0.06173706,0.03793335,0.048736572,0.024627686,0.009727478,0.012229919,0.005847931,0.003004074,0.08026123,-0.038360596,-0.0069236755,-0.018493652,-0.007980347,-0.024795532,0.0048599243,-0.030136108,-0.038879395,-0.0019760132,0.02017212,-0.024169922,0.023666382,-0.074157715,0.008216858,-0.017471313,0.008621216,0.012527466,0.0007338524,-0.0019607544,0.030258179,-0.010002136,0.024505615,0.022918701,-0.03982544,0.020202637,0.01373291,0.039276123,0.052490234,0.019424438,0.025436401,0.003063202,-0.012619019,-0.022949219,0.013252258,-0.029708862,-0.0093307495,0.01626587,0.004283905,-0.0357666,0.00869751,-0.024673462,0.01977539,-0.055725098,0.025314331,0.02029419,-0.008644104,0.0043144226,-0.03579712,-0.012451172,0.012672424,0.0010023117,-0.0044670105,0.031402588,0.0036849976,0.042144775,-0.01676941,-0.0034389496,0.008666992,-0.010353088,-0.025222778,-0.04815674,-0.038269043,0.053344727,-0.017562866,0.029052734,0.046813965,-0.089416504,0.01084137,-0.04711914,0.014060974,-0.017303467,-0.012969971,-0.009063721,0.026046753,-0.014434814,-0.008682251,-0.019226074,-0.01763916,0.011352539,0.03466797,-0.024139404,0.06097412,-0.002149582,0.020950317,0.012428284,0.0109939575,0.023727417,0.028289795,-0.026824951,-0.064453125,-0.08203125,-0.012718201,-0.0049972534,-0.00015687943,-0.04095459,-0.00522995,-0.0056152344,-0.071899414,-0.032562256,-0.025894165,0.009353638,-0.023742676,-0.0035800934,-0.026397705,-0.004005432,0.006790161,-0.055480957,-0.022201538,-0.049102783,0.08288574,0.019378662,0.020355225,0.026046753,-0.008033752,0.035736084,0.026428223,-0.02067566,-0.031143188,0.015975952,-0.01940918,0.0031547546,-0.016174316,-0.0096588135,-0.024734497,0.032592773,0.07055664,0.016326904,-0.0034828186,-0.015258789,-0.052093506,-0.022781372,-0.03439331,-0.0004911423,0.023208618,-0.0013113022,0.03894043,-0.03366089,-0.045318604,0.000023245811,0.011528015,0.011100769,0.04650879,0.013404846,-0.0084991455,0.011772156,0.032165527,-0.035064697,0.018981934,0.024093628,-0.0012922287,-0.029159546,-0.026275635,0.030563354,0.043182373,-0.0309906,0.015563965,-0.023010254,0.015029907,-0.030517578,0.024642944,0.031982422,0.0062446594,-0.030471802,-0.041381836,-0.021713257,0.045043945,0.01058197,-0.03591919,-0.032287598,-0.08300781,0.050109863,0.0340271,0.045654297,-0.01852417,0.0073776245,-0.031143188,0.00907135,-0.04421997,0.040374756,0.07537842,-0.018035889,0.0075035095,0.011390686,-0.009742737,-0.01977539,0.003118515,-0.012382507,-0.032928467,-0.030059814,0.0048713684,-0.0440979,0.03717041,0.010986328,0.037475586,0.06390381,-0.0047721863,-0.041229248,-0.009223938,-0.0035934448,-0.021438599,-0.010848999,-0.0011081696,-0.0099105835,-0.0000526309,0.036468506,0.002527237,0.034698486,-0.013290405,0.013160706,0.012229919,-0.0018634796,-0.016662598,-0.032196045,0.008094788,-0.019699097,-0.085632324,0.00032639503,-0.0055389404,0.059783936,-0.064697266,0.038635254,-0.018005371,0.020874023,0.043884277,-0.01626587,-0.049468994,0.020645142,0.027542114,0.01084137,0.01939392,-0.009925842,-0.03753662,-0.0047683716,0.06732178,-0.03994751,-0.018508911,0.021316528,0.038360596,0.012313843,-0.009849548,-0.058654785,-0.01802063,-0.019226074,-0.052886963,0.018005371,-0.011962891,0.020339966,-0.014160156,0.014778137,-0.04714966,-0.0104904175,-0.030593872,0.026733398,-0.013664246,0.0077819824,-0.020965576,-0.0068092346,0.005203247,0.025756836,-0.026046753,-0.0005340576,0.03845215,0.04232788,-0.013465881,-0.04714966,-0.009590149,-0.010177612,0.015167236,0.02809143,0.0440979,0.020629883,0.0345459,-0.033721924,0.007801056,0.03717041,0.015548706,0.036010742,-0.014579773,0.009529114,-0.07141113,-0.05947876,-0.010437012,-0.040222168,0.025665283,0.021377563,-0.015808105,0.04095459,0.015808105,-0.02458191,-0.04147339,0.021743774,-0.04989624,0.0126953125,0.046569824,-0.014251709,-0.025802612,-0.000020623207,0.015052795,0.006954193,0.03048706,0.01864624,0.021911621,0.06011963,0.04360962,0.0057144165,0.026733398,0.025665283,0.03677368,-0.0071983337,-0.01727295,-0.024520874,0.002790451,0.023452759,-0.01940918,0.0035171509,-0.06604004,0.055023193,0.035583496,0.07733154,0.024337769,0.0011444092,0.035095215,-0.010894775,0.005016327,-0.030517578,-0.008171082,-0.01663208,-0.028060913,0.019470215,-0.006259918,0.011779785,-0.026428223,0.031829834,-0.0014772415,0.01234436,-0.024215698,0.042907715,-0.00029706955,-0.023208618,0.025939941,-0.0015287399,0.021057129,0.038848877,-0.04333496,0.043548584,0.025787354,-0.03274536,0.005317688,0.04849243,-0.021942139,-0.035186768,-0.041107178,-0.031021118,-0.003332138,0.0034427643,-0.042633057,0.0030403137,0.02130127,0.033294678,0.02130127,-0.016601562,-0.012252808,0.011352539,-0.0184021,-0.06335449,-0.014541626,-0.030334473,-0.004108429,0.06311035,-0.008865356,-0.029907227,0.009803772,-0.0115356445,0.008010864,0.008674622,0.019317627,-0.009437561,-0.049194336,0.014289856,0.0013380051,0.019821167,-0.0026454926,0.03527832,0.03302002,0.021408081,0.051940918,0.015457153,-0.017654419,-0.06573486,0.022415161,-0.05432129,0.00012648106,0.024673462,-0.018661499,0.0002001524,-0.008346558,-0.011413574,-0.02798462,0.002199173,-0.03112793,0.023422241,0.019577026,-0.018371582,-0.028701782,-0.07501221,-0.028930664,-0.007434845,0.059265137,0.047851562,0.010101318,-0.036071777,-0.025970459,0.018814087,0.013793945,0.0135650635,-0.013580322,-0.026809692,-0.005130768,-0.038909912,-0.01272583,-0.015426636,0.026275635,0.012176514,-0.0041618347,0.032409668,-0.0059547424,0.010940552,-0.0034236908,0.004535675,0.03439331,-0.028717041,-0.006828308,0.014122009,0.050079346,0.0057411194,-0.016433716,-0.028671265,0.047851562,0.005844116,0.026016235,-0.037475586,-0.013313293,0.0020275116,0.019454956,0.013694763,-0.0236969,-0.016540527,-0.0009403229,-0.045318604,-0.07147217,0.043945312,-0.017120361,0.017578125,0.01247406,0.007980347,0.02885437,0.013000488,0.005115509,0.016174316,-0.03366089,-0.017974854,-0.022415161,-0.024887085,-0.012237549,-0.016799927,-0.00856781,0.014373779,-0.017364502,0.012748718,0.010185242,-0.017745972,0.036712646,0.0070877075,0.020446777,0.032836914,0.002784729,0.023529053,0.04156494,0.013259888,-0.032806396,0.024765015,0.00021886826,0.004070282,-0.009429932,0.038513184,0.024383545,-0.014602661,0.0116119385,-0.007041931,-0.014030457,-0.028823853,-0.015090942,-0.011116028,0.010894775,-0.017578125,-0.046569824,0.027557373,0.026733398,-0.022918701,-0.03024292,0.031280518,0.019515991,-0.030395508,0.03161621,0.037841797,0.052337646,-0.022720337,0.0085372925,0.015434265,0.04171753,0.02078247,0.012466431,-0.022598267,0.029281616,-0.009063721,0.007232666,0.009155273,-0.0052719116,0.009048462,0.00730896,0.029403687,0.021255493,0.009651184,-0.02519226,-0.03250122,0.017608643,-0.014511108,-0.006374359,0.02973938,0.026809692,0.014907837,-0.007396698,0.023147583,0.0035076141,-0.012458801,-0.038726807,0.0067634583,0.041229248,-0.015640259,-0.02482605,0.0044517517,0.0057792664,0.033294678,-0.06964111,-0.0010375977,0.0061035156,0.021072388,-0.028701782,-0.030517578,-0.04675293,0.0078048706,0.01852417,0.013969421,0.012542725,0.024246216,0.009269714,0.0024280548,0.021377563,0.00009435415,0.0039863586,-0.014984131,-0.04547119,-0.009185791,-0.0011100769,0.0029392242,-0.04144287,0.01586914,-0.016326904,-0.020629883,0.005882263,-0.032348633,-0.0040359497,-0.010223389,0.005092621,0.010353088,-0.0041160583,0.012916565,-0.018005371,-0.02494812,0.008872986,0.011276245,0.033721924,-0.043060303,0.018478394,-0.010131836,0.004047394,-0.00349617,0.020202637,0.015571594,0.028442383,0.0045700073,0.05050659,-0.039123535,0.027832031,-0.03161621,0.01737976,-0.0056610107,-0.048034668,-0.005630493,-0.025558472,-0.018844604,0.0496521,-0.022705078,-0.0055160522,-0.03665161,-0.022476196,-0.014450073,-0.041748047,0.007713318,0.033599854,0.036010742,-0.02532959,0.009140015,-0.016998291,0.007270813,-0.012161255,0.00036501884,-0.014579773,0.017944336,0.0070991516,0.0061798096,-0.033233643,-0.028137207,-0.0027427673,-0.0025501251,-0.027328491,-0.03213501,-0.0049057007,-0.006248474,-0.024978638,-0.00844574,-0.027542114,-0.02079773,-0.0048179626,-0.03314209,0.016036987,-0.0087509155,0.01763916,0.0073127747,-0.003118515,0.013916016,0.013038635,-0.008468628,0.043945312,0.011268616,-0.004436493,-0.0473938,0.00068330765,0.021347046,0.018188477,0.005092621,-0.020767212,-0.011528015,-0.012489319,-0.06298828,-0.0073776245,0.004333496,-0.020721436,-0.002008438,0.004085541,-0.036956787,-0.008995056,-0.03781128,0.004837036,0.03387451,0.018447876,0.010192871,-0.0019054413,0.007293701,-0.0013685226,-0.009094238,-0.05065918,0.02986145,0.009437561,-0.003900528,0.029159546,0.042816162,0.0006890297,-0.00015127659,0.0052375793,0.003414154,-0.0033721924,-0.0206604,0.019165039,-0.010322571,0.004173279,-0.0058784485,-0.0062828064,-0.032592773,0.004337311,0.0791626,-0.00045108795,-0.01586914,0.001537323,0.0121154785,0.025238037,0.012046814,-0.033294678,-0.013847351,-0.041290283,0.0071372986,-0.009262085,0.04159546,-0.005947113,0.021759033,-0.021591187,-0.049316406,-0.017501831,0.01612854,-0.024169922,-0.060943604,-0.014755249,-0.059509277,0.0052375793,0.0019340515,-0.035125732,0.0069351196,0.025939941,-0.004886627,-0.079589844,0.018508911,0.046295166,-0.00078868866,0.023864746,-0.012329102,0.026321411,0.018737793,-0.036712646,-0.03137207,0.016021729,-0.032348633,-0.00032925606,-0.023208618,0.018112183,-0.008308411,-0.028427124,0.016555786,0.014907837,0.014221191,-0.012962341,0.008491516,-0.00049972534,0.0050468445,-0.0058135986,0.035125732,-0.01058197,-0.0135650635,0.03152466,-0.049468994,0.00084781647,0.017501831,-0.010177612,0.010810852,0.031066895,0.039733887,-0.044128418,0.008491516,0.030044556,0.02355957,0.042144775,-0.026153564,0.026046753,0.023513794,-0.013298035,0.023544312,-0.008598328,-0.026046753,-0.051574707,-0.017349243,0.03152466,-0.006439209,0.0058898926,-0.019363403,0.03363037,0.0032367706,-0.0054740906,0.009262085,-0.012382507,-0.025421143,-0.006752014,-0.0021152496,-0.0049705505,0.017562866,-0.012527466,0.018508911,0.007698059,0.039978027,0.00756073,-0.0059814453,0.038757324,0.024139404,-0.01234436,0.01234436,0.028900146,-0.0034866333,0.019729614,0.015716553,-0.00030493736,-0.05029297,-0.018478394,-0.02432251,-0.0053634644,0.0018396378,-0.002998352,-0.011100769,0.0067825317,-0.008903503,-0.009605408,-0.020889282,0.009536743,-0.024169922,-0.035827637,-0.016647339,-0.014678955,0.015388489,0.016036987,0.008659363,0.031921387,-0.008392334,0.049316406,0.015457153,-0.006149292,0.031677246,0.037628174,0.014259338,-0.022628784,-0.015235901,0.006362915,0.006790161,0.008415222,-0.01701355,0.015411377,0.03277588,-0.0033035278,0.0021648407,0.0056762695,0.029891968,-0.009033203,0.0181427,0.0076942444,0.021514893,-0.025054932,0.03933716,-0.043121338,0.005420685,0.015701294,0.0065994263,-0.010612488,-0.014892578,-0.03652954,0.013893127,0.014312744,-0.006111145,0.056793213,-0.0067634583,0.030471802,-0.02355957,-0.016616821,0.01348114,-0.019195557,-0.010551453,0.036895752,-0.006362915,0.011314392,0.006225586,-0.028137207,0.024963379,-0.027786255,0.019836426,-0.015914917,0.005256653,-0.023620605,-0.020080566,-0.027938843,-0.01966858,-0.016342163,-0.006389618,0.0029067993,0.04296875,0.00730896,0.034301758,0.05126953,0.019699097,0.02217102,-0.04055786,-0.035369873,-0.0032424927,-0.025299072,0.017974854,-0.012023926,0.04989624,0.05029297,0.014640808,0.024887085,0.023345947,0.035125732,0.013046265,0.0047836304,-0.019699097,0.0064086914,0.0028877258,0.016357422,-0.0021381378,0.030639648,-0.007434845,0.0072517395,-0.0057678223,0.020599365,-0.043121338,0.041656494,0.070617676,0.012207031,-0.0053367615,0.030181885,-0.0040359497,-0.036102295,-0.011207581,-0.00982666,0.06427002,0.012779236,0.05496216,0.032592773,0.0038928986,-0.01473999,0.019699097,-0.03692627,-0.027328491,0.057403564,0.038604736,-0.02746582,-0.016647339,-0.0055503845,-0.0024528503,-0.04788208,-0.035095215,0.009635925,0.0040016174,0.027740479,0.0022029877,0.010787964,-0.007785797,0.017440796,0.0335083,0.0012588501,-0.017211914,0.02798462,0.036315918,0.0006799698,0.017837524,-0.011955261,0.042938232,-0.018478394,-0.010864258,0.017791748,0.025161743,-0.014831543,-0.005908966,0.023361206,-0.012710571,0.050323486,0.04901123,-0.014099121,0.008636475,0.022750854,0.018112183,-0.011413574,0.038909912,0.03338623,0.024993896,0.030914307,0.032318115,0.016723633,-0.025543213,0.02305603,-0.0073394775,0.0066375732,-0.0015335083,-0.0073432922,0.010719299,-0.014511108,0.019561768,0.0013618469,-0.012969971,0.017700195,0.026321411,0.0030956268,0.0032405853,-0.027175903,0.00042128563,-0.023986816,0.0014076233,0.020095825,-0.018218994,0.022918701,0.01828003,0.03161621,-0.025268555,0.022598267,-0.018844604,-0.02609253,-0.014755249,0.010047913,-0.032165527,0.0011148453,0.006958008,0.005619049,-0.05319214,0.019989014,0.01524353,-0.026351929,0.03112793,-0.001332283,-0.0019626617,0.0011959076,0.022659302,-0.0034065247,-0.019042969,-0.02545166,-0.021743774,0.035308838,0.040863037,0.017837524,0.026046753,-0.025680542,-0.017654419,-0.0013303757,0.0024089813,-0.009613037,-0.011756897,-0.0023212433,-0.028442383,0.019622803,0.0317688,0.008735657,0.036895752,0.0020484924,-0.014320374,0.0050354004,0.02758789,0.01084137,-0.005847931,-0.0066108704,0.014831543,-0.010505676,0.038116455,0.044708252,-0.011566162,0.017929077,-0.03048706,-0.014297485,0.006263733,-0.0027313232,0.022476196,-0.006832123,0.015853882,-0.018249512,0.037384033,-0.019897461,-0.03930664,0.010391235,-0.011459351,-0.014717102,-0.029663086,0.012298584,0.0013589859,0.015312195,0.03527832,0.018859863,-0.02935791,0.06335449,-0.024414062,0.046203613,-0.017211914,-0.0027370453,0.0413208,0.029052734,0.033721924,0.008285522,0.0041389465,-0.023788452,0.015205383,0.057434082,0.027832031,0.017425537,0.008361816,-0.017532349,0.038726807,0.0017728806,0.035003662,-0.0137786865,-0.0088272095,0.012550354,0.000869751,-0.0018692017,0.007156372,0.00018715858,0.015457153,0.03161621,-0.03125,0.0011777878,-0.022659302,-0.01108551,0.030792236,-0.0045661926,-0.009216309,0.009933472,-0.027359009,0.017868042,-0.017791748,-0.021087646,-0.0075416565,0.025894165,-0.050994873,-0.029403687,0.006416321,0.015426636,-0.014602661,0.025939941,0.017059326,0.0021591187,0.01626587,0.018417358,-0.004776001,0.03918457,-0.0040359497,0.010253906,0.041809082,-0.0035247803,-0.021011353,0.00969696,0.00592041,-0.0124053955,0.0031833649,0.03933716,-0.012702942,0.0014123917,-0.0054473877,-0.010864258,0.006225586,0.003868103,-0.005016327,-0.008041382,0.00043463707,-0.018554688,-0.003856659,0.0010032654,-0.0019836426,-0.00034213066,-0.0072250366,-0.012435913,0.009094238,0.032409668,0.017456055,-0.039733887,0.0008234978,0.00051784515,0.007827759,-0.01259613,-0.009254456,-0.011245728,-0.03970337,0.028945923,0.003112793,0.00033688545,0.014503479,-0.027435303,0.0070343018,0.030517578,0.006225586,0.008377075,0.009292603,-0.015235901,0.018295288,-0.009811401,-0.017990112,-0.0038909912,-0.012489319,0.0016374588,0.01007843,-0.006336212,-0.029754639,0.042663574,-0.008628845,0.016281128,0.0029315948,-0.023239136,0.027618408,-0.008758545,-0.0028820038,0.008071899,0.02067566,-0.0029201508,-0.01763916,-0.010360718,0.01234436,0.057556152,-0.010009766,-0.011276245,0.026504517,0.016647339,0.005908966,0.034118652,0.021881104,0.04272461,0.027008057,-0.030776978,-0.007835388,0.018371582,-0.016571045,-0.012565613,0.012008667,-0.013679504,-0.031982422,0.028015137,0.011352539,-0.010536194,-0.022109985,-0.01953125,-0.02268982,-0.04031372,0.0009803772,-0.03010559,0.013221741,-0.010681152,-0.013641357,0.013549805,-0.01940918,-0.03942871,-0.024658203,-0.0029678345,-0.0072746277,-0.052886963,0.007293701,-0.0390625,0.006958008,-0.022918701,-0.0129852295,-0.011451721,0.033447266,-0.022888184,-0.0004963875,-0.00198555,0.01828003,0.017593384,0.022216797,0.025543213,-0.018295288,-0.047790527,-0.02116394,-0.007881165,-0.0001295805,0.019470215,0.00440979,0.033843994,0.01171875,-0.007888794,-0.0040397644,-0.009147644,0.0039138794,-0.009788513,-0.017822266,-0.0075149536,0.00440979,0.021820068,-0.0024318695,-0.0020942688,0.030548096,-0.01940918,-0.020385742,0.019836426,0.04940796,0.0049743652,0.026229858,-0.01940918,-0.009483337,0.0017719269,0.01448822,-0.019088745,0.013504028,0.01159668,0.0016450882,0.0031986237,0.009490967,0.034301758,-0.004688263,-0.016616821,0.0101623535,0.0069351196,-0.004760742,0.042388916,0.018005371,-0.0046081543,-0.023788452,-0.017700195,0.026168823,0.048461914,0.020584106,-0.00051784515,0.00070142746,-0.0116119385,-0.019165039,0.017059326,0.015914917,-0.014213562,-0.0340271,-0.016952515,-0.014373779,0.024810791,0.00046491623,0.037628174,-0.012557983,0.023223877,-0.0256958,-0.027282715,-0.024765015,0.035980225,0.015083313,-0.0095825195,-0.018066406,-0.015701294,0.01713562,-0.027618408,-0.0013456345,-0.04043579,-0.015167236,0.0006313324,-0.009460449,0.02923584,0.012191772,0.00011587143,-0.005718231,0.004711151,-0.016937256,0.0072746277,0.025787354,-0.03555298,0.0015258789,0.026397705,0.009963989,-0.036743164,0.024536133,0.0010290146,-0.0060768127,0.017654419,-0.014656067,0.0066833496,-0.021377563,0.04043579,-0.0009646416,0.0052948,0.034698486,0.0051994324,0.017654419,-0.020050049,0.024765015,0.010620117,0.008621216,0.048217773,-0.016174316,-0.02053833,0.020355225,-0.014007568,-0.030136108,0.0116119385,0.025650024,0.035064697,-0.017425537,0.03366089,-0.0052719116,-0.0031394958,-0.0020637512,0.017944336,-0.025314331,-0.014259338,0.026733398,0.005455017,-0.0008921623,0.0129470825,-0.024932861,-0.05114746,-0.021209717,0.008346558,0.009902954,-0.011131287,0.019180298,0.0020561218,0.059326172,-0.0087509155,0.016845703,0.019332886,-0.00617218,0.023513794,0.015159607,0.03881836,0.011909485,-0.028289795,0.015808105,-0.013114929,-0.008453369,-0.00365448,0.00013780594,0.0010147095,-0.03161621,0.020095825,-0.0046691895,0.030914307,-0.016326904,0.012870789,-0.0105896,-0.0010671616,-0.031051636,-0.015533447,-0.013214111,0.021560669,0.044281006,0.015090942,0.017425537,0.010971069,-0.020004272,0.016357422,0.041107178,-0.019989014,-0.028793335,-0.012374878,0.012908936,0.010253906,0.009559631,0.02279663,-0.012840271,-0.016067505,0.0128479,-0.008232117,0.0118255615,0.0043411255,0.0032024384,0.008720398,-0.004016876,-0.006336212,0.041778564,-0.0046691895,0.0026683807,-0.0057144165,0.0093688965,0.033721924,0.026779175,-0.016357422,0.038909912,0.017913818,-0.030715942,0.055267334,-0.006580353,0.015533447,-0.0209198,0.008544922,-0.03717041,-0.012748718,-0.0012102127,0.0015239716],"createdAt":"2026-04-19T05:29:52.882Z","updatedAt":"2026-04-22T01:02:00.461Z","lastSeenAt":"2026-04-22T01:02:00.461Z","tsv":"'/api/v1/collections/7':55,154 '/call':15,32 '0.02':14,31,70,134 '000':62 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':67 '20':61 '402 payment protocol' '6':75 'Base network API' 'USDC API access' 'accept':56,170 'access':7,24,42,164 'across':94 'ai':104 'analysi':108 'analyt':98 'api':6,23,41,93,139,163,187 'appear':192 'base':11,28,50,63,84 'base-network' 'beyond':159 'bodi':179 'broader':86 'categori':95 'chain':82 'charg':60 'classif':111 'commit':147 'connect':196 'convers':127 'data':97,101 'decim':76 'discover':175 'doc':184 'document':158,202 'embed':112 'endpoint':36,54,130,155 'equal':69 'estim':122 'exchang':117 'export':102 'expos':200 'feed':116 'financ':113 'function':151 'gas':121 'generat':128 'geocod':125 'http':171 'http-post' 'includ':96 'indic':168 'infrastructur':124 'insight':103 'key':140 'label':161 'learn':106 'limit':143 'lowpaymentfee' 'lowpaymentfee.com':38,87 'machin':105 'metric':99 'micropayment API' 'minimum':146 'network':12,29,51 'no-api-key' 'no-rate-limits' 'offer':89 'on-chain':80 'output':166 'page':188 'pay':2,19 'pay-per-call API' 'pay-per-request':1,18 'payment':46,77 'per':3,20,71,135 'per-request-billing' 'platform':88 'post':57,172 'premium':5,22,40,162 'price':115,132,185 'protocol':47 'provid':39,182 'quot':120 'rate':118,142 'report':100 'request':4,21,58,72,136 'request/response':178 'requir':148,194 'schema':167,180 'sentiment':107 'settl':79 'site':191 'specif':53,150 'suit':91 'summar':110 'text':109 'token':119 'unit':64 'usdc':17,34,66,73 'usdc-settlement' 'use':74 'valid':126 'via':8,25,43 'wallet':195 'web3':114 'x402':9,26,45 'x402 endpoint' 'x402-payment'","prices":[{"id":"96eb7b8c-c767-4214-853e-42c90c6ca378","listingId":"a55c3144-fc73-4392-832a-3260096f9d43","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/collections/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T05:29:52.882Z"}],"sources":[{"listingId":"a55c3144-fc73-4392-832a-3260096f9d43","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:52.882Z","lastSeenAt":"2026-04-22T01:02:00.461Z"}],"details":{"listingId":"a55c3144-fc73-4392-832a-3260096f9d43","quickStartSnippet":"# Send a POST with x402 payment header to access the endpoint\ncurl -X POST https://lowpaymentfee.com/api/v1/collections/7 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <your-x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/7"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/7"}],"useCases":["Accessing premium data or services without API key registration","Agent-driven workflows that need instant pay-per-use API access","Testing x402 payment protocol integrations on Base"],"bestFor":["Developers wanting frictionless pay-per-request APIs without signup","AI agents that can settle x402 payments autonomously","Users who prefer on-chain USDC micropayments over subscriptions"],"notFor":["Users who need detailed API documentation before purchasing","High-volume consumers who want bulk pricing or subscriptions","Anyone without a Base-compatible wallet or USDC balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.494Z"},"updatedAt":"2026-04-22T01:02:00.461Z"}}