{"id":"4cf1bf9b-c1b1-44ed-9b8f-9e863f8d8010","shortId":"cR4K3F","kind":"x402","title":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at `/api/v1/ehr/53` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs settled in USDC on the Base network. The specific resource at path `/ehr/53` is labeled \"Premium API Access\" in the x402 challenge but its exact data payload is unclear — the \"ehr\" path segment suggests Electronic Health Records, though the provider's landing page does not list this endpoint among its documented API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The endpoint is live and returns a valid x402 challenge on POST.\n\nPricing is $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 exact scheme on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout. The platform advertises no API keys, no rate limits, and instant access.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no description of what data this particular endpoint returns. The \"ehr/53\" path is not mentioned anywhere on the site's landing page, making it difficult to determine the actual functionality without making a paid request.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ehr-data"],"categories":["data","health"],"synonyms":["electronic health records","EHR API","medical records API","health data endpoint","x402 EHR","lowpaymentfee","pay-per-call health API"],"warnings":["The /ehr/53 endpoint is not listed among the provider's documented APIs on the landing page — its actual functionality is unverified.","No request or response schema is available; the output of a paid call is unknown.","The 'ehr' path suggests health/medical data which may be subject to regulatory requirements (HIPAA, etc.) — no compliance documentation is provided.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/53","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/ehr/53","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the /ehr/53 endpoint actually returns. No OpenAPI spec, no request/response schema, no examples. The endpoint path is not listed on the provider's own landing page. 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":"2026-04-21T18:47:59.327Z","embedding":[-0.03378296,-0.040740967,0.057281494,0.02861023,0.0071868896,-0.012306213,-0.0069084167,0.045959473,0.04449463,-0.06616211,0.051605225,-0.062072754,-0.023422241,-0.02949524,-0.016525269,0.025436401,0.008766174,-0.025436401,-0.047790527,0.04486084,0.035369873,-0.0231781,-0.0009784698,0.029418945,-0.010444641,-0.005443573,-0.0009756088,-0.011932373,-0.016799927,-0.0541687,0.015701294,-0.018432617,0.0009851456,0.010025024,-0.022003174,0.0038967133,0.0005478859,0.06286621,0.014587402,0.0124053955,-0.0020885468,-0.057434082,0.0073127747,-0.0044517517,-0.051757812,-0.030059814,0.0077590942,-0.02998352,0.019180298,-0.0076789856,-0.02885437,0.005973816,-0.03289795,0.008148193,0.001493454,0.005317688,-0.0028076172,0.018920898,0.00035119057,0.019866943,0.03414917,-0.068115234,-0.026824951,-0.005104065,0.019683838,0.04437256,0.0052948,0.056793213,0.028045654,0.0579834,0.025390625,0.054534912,0.028152466,0.023101807,0.010986328,-0.013160706,-0.0020275116,0.039489746,0.005504608,-0.018692017,-0.0075683594,-0.017333984,-0.047576904,-0.019866943,-0.010536194,-0.058685303,-0.031951904,-0.0033054352,-0.039611816,0.019165039,-0.08001709,-0.009765625,0.016342163,0.014724731,0.013381958,-0.002046585,-0.05126953,0.011909485,-0.005794525,0.019851685,-0.0022945404,-0.05480957,0.026443481,-0.015098572,0.050811768,0.042236328,0.01386261,0.017501831,0.024368286,-0.018341064,-0.02671814,0.010391235,-0.017868042,-0.017211914,0.011367798,0.024002075,-0.034454346,0.006416321,-0.02583313,0.03062439,-0.04147339,0.05316162,0.02545166,-0.016036987,0.014671326,-0.033325195,-0.000028014183,0.010658264,-0.032958984,-0.039154053,0.044403076,0.019119263,0.021606445,-0.00869751,-0.026916504,0.028503418,0.0022964478,-0.035095215,-0.057434082,-0.042755127,0.027450562,-0.006790161,0.02746582,0.011634827,-0.06945801,0.0048294067,-0.03829956,0.016601562,-0.018920898,-0.00066518784,0.009933472,0.030227661,0.02015686,0.0011463165,-0.017623901,-0.025878906,0.003118515,0.022857666,-0.012168884,0.049316406,-0.007827759,0.023956299,0.03100586,-0.0033283234,0.041259766,0.042144775,-0.00040459633,-0.08892822,-0.07366943,-0.014503479,-0.0413208,-0.0066986084,-0.0076446533,0.023773193,-0.016799927,-0.066345215,0.00089740753,0.008285522,0.006111145,-0.027954102,0.01574707,-0.025848389,-0.005065918,0.013320923,-0.030731201,-0.009719849,-0.02973938,0.057647705,0.0065612793,-0.002407074,0.03378296,0.010505676,0.06591797,0.0028953552,-0.018096924,-0.03366089,0.022537231,-0.016601562,0.05444336,0.0045814514,0.01776123,-0.021697998,0.040405273,0.041748047,0.023773193,-0.031921387,-0.0132751465,-0.04147339,-0.025482178,-0.0082092285,0.025466919,-0.00059890747,0.0018568039,0.034942627,-0.015808105,-0.017929077,-0.0049324036,0.008346558,0.046569824,0.037628174,0.0026435852,0.0012950897,0.024871826,0.019958496,-0.034423828,0.02154541,0.016326904,0.009963989,-0.02357483,-0.016601562,0.021133423,0.022583008,-0.01626587,0.0026760101,-0.010917664,0.03111267,-0.013633728,-0.020202637,0.012008667,-0.012008667,-0.014022827,-0.04220581,-0.010513306,0.0009050369,-0.00049972534,-0.032409668,-0.03994751,-0.08502197,0.04928589,0.058685303,-0.003276825,-0.0014457703,0.025283813,-0.03555298,-0.028961182,-0.0519104,0.032226562,0.062072754,-0.017486572,-0.0262146,0.013801575,-0.023483276,-0.021072388,-0.0096206665,0.006542206,-0.023590088,-0.013336182,0.0013360977,-0.05065918,0.0037517548,0.04171753,0.019180298,0.052246094,-0.031433105,-0.038513184,-0.01675415,-0.008781433,-0.0010089874,-0.05029297,-0.017166138,0.00017678738,0.052001953,0.011741638,-0.032043457,0.020599365,-0.0021781921,-0.0027999878,-0.015304565,-0.013923645,-0.0057907104,-0.023483276,0.007896423,0.026550293,-0.082214355,0.005088806,-0.009719849,0.053466797,-0.039733887,0.03262329,-0.00932312,0.0058631897,0.06591797,-0.006134033,-0.049316406,-0.01852417,0.021270752,0.0340271,0.039215088,0.0030879974,0.008911133,-0.025924683,0.057159424,-0.0026283264,0.0023460388,-0.0034980774,0.018493652,0.038482666,0.0042762756,-0.051208496,-0.052337646,0.0046691895,-0.013290405,0.027694702,-0.03930664,0.014129639,-0.00015819073,-0.010597229,-0.011993408,-0.006958008,-0.032714844,-0.011756897,-0.0289917,-0.0028629303,-0.027328491,0.017150879,0.019607544,0.009735107,0.0067863464,0.029571533,0.061523438,0.029174805,-0.048431396,-0.03314209,-0.027389526,-0.022583008,-0.008270264,0.0023269653,0.009468079,0.016036987,0.039916992,-0.053863525,0.0077323914,-0.011711121,0.007873535,0.019515991,-0.00881958,-0.0053367615,-0.08026123,-0.06311035,-0.01626587,-0.055480957,0.016860962,0.015960693,0.009902954,0.05709839,0.0051879883,-0.014671326,-0.034942627,0.02998352,-0.0385437,-0.0014295578,0.010559082,-0.0053100586,-0.04916382,-0.0013589859,0.0006957054,0.010017395,0.03387451,0.026031494,0.014251709,0.052001953,0.033691406,-0.007709503,0.005760193,0.023422241,0.037384033,-0.03753662,0.01235199,-0.046966553,-0.033203125,0.03567505,-0.015975952,-0.038238525,-0.07116699,0.05227661,0.035339355,0.054504395,0.040405273,0.009811401,0.036071777,-0.024810791,0.00014448166,-0.018310547,-0.020126343,-0.012550354,-0.04949951,-0.0017538071,0.00248909,0.020721436,-0.063964844,0.010673523,0.022033691,0.025283813,-0.027175903,0.05618286,-0.017654419,-0.011703491,0.022628784,-0.0045394897,0.029174805,0.043914795,-0.05090332,0.0020046234,0.031433105,-0.023147583,-0.02217102,0.03439331,0.0023117065,-0.008918762,-0.046173096,-0.03668213,0.014274597,-0.013458252,-0.038635254,-0.0077323914,0.017745972,0.01235199,0.031311035,-0.015098572,-0.009895325,-0.018127441,-0.006023407,-0.048583984,0.0013570786,-0.03475952,0.023773193,0.049468994,-0.020462036,0.004524231,0.01737976,0.0060653687,-0.012184143,0.010505676,0.0006480217,-0.0057678223,-0.038970947,0.043914795,0.0062294006,-0.0070495605,0.02003479,0.044158936,0.027633667,0.04055786,0.050445557,0.0012626648,-0.019714355,-0.082458496,0.015083313,-0.049468994,0.0006842613,0.009292603,-0.034210205,0.011169434,-0.012992859,-0.004638672,0.009346008,-0.010467529,-0.03643799,0.0024471283,0.02281189,-0.023880005,-0.04348755,-0.061645508,-0.02684021,0.016235352,0.070495605,0.060546875,-0.0031375885,-0.03717041,0.008712769,0.036254883,0.014266968,0.010955811,-0.015930176,-0.022766113,-0.025756836,-0.023544312,-0.019958496,-0.018692017,0.02268982,-0.0077323914,-0.0206604,0.023376465,-0.0041770935,0.018218994,0.023208618,-0.011772156,0.03086853,-0.027236938,0.01121521,-0.00932312,0.015357971,0.0043792725,-0.00003707409,-0.053833008,0.025405884,0.012565613,0.039489746,-0.05029297,-0.0004222393,-0.008354187,0.017623901,-0.002670288,-0.014778137,-0.004512787,-0.005088806,-0.0552063,-0.048553467,0.029449463,-0.026397705,0.012649536,0.0075645447,0.0026569366,0.0390625,0.0036773682,0.008285522,0.017333984,-0.023208618,-0.030014038,-0.037841797,-0.041809082,-0.0137786865,0.0033779144,-0.014198303,0.038391113,0.0019893646,0.031173706,-0.009986877,-0.015945435,0.0028839111,0.0021133423,-0.015594482,0.004776001,-0.0022964478,-0.0029296875,0.05899048,0.004283905,-0.029205322,0.03137207,0.0031394958,0.005947113,0.002002716,0.039733887,0.03253174,-0.03036499,0.0026226044,-0.001739502,0.00085401535,-0.036468506,-0.0033016205,0.034332275,0.0055007935,-0.00554657,-0.012054443,0.018447876,0.019134521,-0.017150879,-0.008255005,0.026306152,0.02720642,-0.037994385,0.010414124,0.025497437,0.041809082,-0.01612854,-0.0009303093,0.011680603,0.029953003,0.0079193115,0.008758545,-0.0103302,0.017623901,0.006591797,0.0078125,0.013847351,-0.018493652,0.0107040405,-0.011161804,0.011016846,0.026947021,0.012664795,-0.017044067,-0.012413025,0.012130737,0.015396118,-0.012458801,0.03111267,0.030899048,0.019851685,-0.024002075,0.014953613,0.024093628,-0.02633667,-0.014602661,-0.00548172,0.04119873,-0.010917664,-0.016937256,0.010749817,0.021713257,0.03643799,-0.059814453,-0.014884949,0.006324768,0.0018405914,-0.030792236,-0.075683594,-0.017349243,-0.01802063,0.029067993,-0.0087890625,-0.00083875656,0.011886597,-0.0077705383,0.0050735474,0.022277832,-0.010017395,-0.009178162,-0.01940918,-0.04849243,-0.0017776489,-0.010353088,-0.011177063,-0.014305115,0.009750366,-0.03062439,-0.0335083,0.012435913,-0.022659302,-0.0151901245,-0.008743286,0.022521973,0.03543091,0.0069770813,0.017166138,-0.023086548,-0.0524292,-0.0041389465,0.010040283,0.022857666,-0.038879395,0.0234375,-0.010353088,-0.01322937,0.010025024,0.020111084,0.031921387,0.03515625,-0.0071525574,0.026153564,-0.018173218,0.038513184,-0.022949219,-0.00434494,-0.0032196045,-0.048950195,-0.009117126,-0.022125244,-0.023284912,0.017044067,0.002948761,-0.010047913,-0.017654419,-0.04272461,-0.015464783,-0.053222656,0.023239136,0.018692017,0.024108887,-0.013557434,0.021240234,-0.0044059753,0.01449585,0.0031108856,-0.0072250366,-0.016494751,0.016311646,0.024368286,-0.003112793,-0.053863525,-0.009750366,-0.0011463165,-0.0028800964,-0.045715332,-0.04296875,-0.017349243,-0.013687134,0.0024585724,0.012573242,-0.017471313,-0.02268982,-0.01687622,-0.015411377,0.0042762756,-0.00459671,0.0024528503,0.0085372925,-0.011146545,0.019515991,0.015182495,-0.019851685,0.03894043,-0.01020813,-0.022720337,-0.032440186,0.005455017,0.036499023,0.02909851,-0.011169434,-0.031433105,-0.011871338,-0.027252197,-0.04928589,0.009468079,-0.00038075447,0.013954163,-0.005176544,-0.011779785,-0.04043579,0.0009522438,-0.030654907,0.0058174133,0.0016460419,0.0023860931,0.0011835098,0.010131836,0.019836426,0.008804321,-0.02520752,-0.04550171,0.010444641,0.0115737915,-0.025680542,0.024963379,0.048950195,-0.020248413,0.00046348572,-0.00083208084,0.0155181885,-0.00095129013,-0.024291992,0.022628784,-0.026794434,0.013092041,0.0067825317,-0.008140564,-0.029907227,0.005672455,0.048736572,0.0119018555,-0.006286621,0.02331543,-0.0014429092,0.010726929,0.06512451,-0.056884766,0.00014472008,-0.015701294,0.018493652,-0.015594482,0.0076026917,0.002626419,0.011543274,-0.034057617,-0.06536865,-0.0070648193,0.011947632,0.005821228,-0.07128906,-0.031341553,-0.052642822,-0.009284973,-0.022521973,-0.011360168,0.004447937,-0.0143966675,-0.021270752,-0.07397461,0.02166748,0.06439209,-0.010894775,0.020217896,-0.012283325,0.00422287,0.03137207,-0.014328003,-0.014099121,0.03704834,-0.014183044,-0.015945435,-0.016021729,0.03704834,-0.021575928,-0.026397705,0.029693604,0.009109497,0.014183044,-0.0030879974,0.009773254,0.008522034,0.0010271072,-0.028060913,0.015853882,-0.011360168,-0.029312134,0.04031372,-0.058685303,0.0076522827,0.0090408325,-0.003238678,0.0008339882,0.025054932,0.031173706,-0.028015137,-0.018707275,0.031707764,0.017654419,0.040161133,-0.033203125,0.036743164,0.00894165,-0.03668213,0.005443573,-0.007896423,-0.017227173,-0.045013428,-0.035980225,0.010047913,0.017074585,-0.013496399,-0.014030457,-0.012527466,0.0087890625,0.0011854172,0.008880615,-0.015029907,-0.0317688,-0.02607727,0.006713867,0.028198242,-0.0040740967,0.0019874573,0.033325195,0.035949707,0.043304443,-0.012107849,0.0064964294,0.019622803,0.025985718,-0.03970337,0.013496399,0.011810303,0.03265381,0.0289917,0.02784729,0.017654419,-0.03668213,-0.01626587,-0.024093628,-0.018447876,0.0072402954,-0.011184692,-0.0107803345,0.0038661957,0.01953125,0.0032215118,-0.040985107,0.009536743,-0.03845215,-0.02494812,0.008232117,0.015914917,-0.0023384094,0.03768921,0.00085163116,0.018493652,0.0020198822,0.031555176,-0.009117126,0.0052490234,0.047790527,0.031066895,0.0014438629,-0.021957397,0.009185791,-0.0006952286,-0.0065193176,0.0034656525,0.008468628,0.0158844,0.03768921,-0.03050232,0.011512756,-0.005683899,-0.0017127991,-0.02507019,0.007785797,-0.02180481,0.0015106201,-0.0029392242,0.02670288,-0.03894043,-0.0035190582,0.021102905,0.017425537,-0.019607544,-0.0025672913,-0.005542755,0.031585693,0.0112838745,-0.0029621124,0.030258179,-0.02180481,0.026306152,-0.019332886,-0.0096206665,-0.003353119,-0.01499176,-0.027374268,0.015792847,-0.0113220215,-0.02015686,0.027404785,-0.028930664,0.04977417,-0.04437256,-0.0046195984,-0.009277344,-0.00058317184,-0.012588501,-0.03050232,-0.010185242,0.013122559,-0.011360168,-0.0046539307,-0.021224976,0.0413208,0.045959473,0.023651123,0.028549194,0.018463135,0.01763916,-0.03842163,-0.026733398,0.018676758,-0.0061416626,0.012992859,-0.014167786,0.040374756,0.026443481,0.017822266,0.039001465,0.03579712,0.018920898,-0.001496315,0.009513855,-0.0066108704,-0.0034217834,0.0047187805,0.040618896,0.0033721924,0.043945312,-0.0025672913,-0.0053100586,0.0008382797,0.03881836,-0.0051612854,0.029571533,0.08099365,0.035736084,-0.01864624,0.04333496,-0.0047187805,-0.008026123,-0.036102295,-0.018203735,0.041900635,-0.02949524,0.05517578,0.038513184,0.007843018,-0.012367249,0.015670776,-0.01474762,-0.020935059,0.031585693,0.028686523,-0.023864746,-0.0034484863,0.008285522,0.00409317,-0.04763794,-0.010940552,0.010116577,0.009178162,0.0020751953,-0.01776123,0.008705139,-0.0030097961,0.02407837,0.00623703,0.024169922,-0.012535095,0.013031006,0.0038089752,0.014373779,0.0423584,0.006324768,0.005355835,-0.012329102,-0.036224365,-0.0116119385,0.035980225,0.0029830933,-0.0062942505,0.001203537,0.02053833,0.046325684,0.024673462,-0.014907837,-0.011917114,0.03186035,0.019851685,-0.00070238113,0.044067383,0.027023315,0.015220642,0.0135269165,0.027038574,0.020736694,-0.04071045,0.022323608,0.0073127747,0.00062322617,-0.02357483,0.0022697449,-0.003232956,-0.016952515,0.012886047,-0.0060691833,0.016647339,0.03604126,0.022857666,0.0030956268,-0.010375977,0.008125305,0.018203735,0.0044670105,-0.012008667,0.028503418,-0.013664246,0.03125,0.00969696,0.046081543,-0.022872925,0.038024902,-0.0064048767,0.0071868896,-0.021621704,0.012481689,-0.034423828,0.02180481,0.010406494,-0.011383057,-0.037322998,0.029464722,0.033599854,0.010688782,0.0026397705,0.017715454,-0.006816864,0.0012149811,0.02330017,0.023147583,-0.023254395,0.004295349,-0.020217896,0.030960083,0.052124023,0.010795593,-0.0087890625,-0.0069084167,-0.00079393387,0.01386261,0.0046691895,-0.015167236,0.013191223,-0.0259552,-0.01939392,0.02784729,0.029144287,0.0046157837,0.044189453,-0.010215759,-0.009231567,0.010368347,0.018295288,-0.011138916,0.01626587,-0.012008667,0.014778137,-0.02267456,0.05508423,0.028961182,-0.0040664673,0.0151901245,-0.0014505386,-0.023361206,0.0069351196,-0.012718201,0.017288208,-0.0012016296,0.012237549,0.0013065338,0.006793976,-0.016799927,-0.020828247,0.014625549,-0.01876831,-0.0262146,-0.026824951,0.0015735626,-0.0030708313,0.013954163,0.0362854,0.015609741,-0.016647339,0.06524658,-0.0075950623,0.041625977,-0.0070381165,0.016799927,0.053009033,0.014923096,0.033721924,0.027938843,0.0018281937,-0.042419434,0.01928711,0.022232056,0.0357666,0.012008667,0.019577026,-0.03302002,0.03466797,-0.016830444,0.041625977,-0.008422852,-0.020126343,0.009063721,-0.0036964417,-0.020401001,0.011245728,0.0005726814,0.02822876,0.034210205,-0.0335083,-0.0146102905,-0.017288208,-0.005554199,0.03881836,-0.0074691772,-0.0034236908,0.00932312,-0.018508911,0.0178833,-0.017990112,-0.022628784,0.02078247,0.032318115,-0.041900635,-0.016342163,-0.009521484,0.02015686,-0.010368347,0.016036987,0.049804688,-0.017486572,0.012718201,0.045562744,-0.01272583,0.024307251,-0.027038574,0.033203125,0.045440674,0.01411438,-0.0023441315,-0.0087509155,0.010848999,-0.017318726,0.008682251,0.03955078,-0.015014648,0.016464233,0.009506226,-0.007259369,0.0006184578,0.013793945,0.0015621185,0.018310547,-0.014923096,-0.007583618,0.0054016113,0.0033893585,0.019195557,0.014518738,-0.004146576,-0.019744873,0.020355225,0.0206604,0.0041236877,-0.045288086,0.014091492,0.018936157,0.016921997,-0.02432251,-0.02116394,-0.0037651062,-0.029388428,0.014442444,0.025863647,0.0067863464,0.009025574,-0.012016296,0.014709473,0.022781372,0.018112183,0.016906738,0.019683838,0.017868042,0.00042557716,-0.017990112,0.00079488754,0.0049095154,-0.012039185,-0.0062942505,0.016052246,-0.018112183,-0.013801575,0.003566742,0.0078048706,-0.0023384094,-0.00054216385,-0.008850098,0.031829834,-0.011260986,0.010726929,-0.0013856888,0.013687134,-0.017044067,-0.004917145,-0.023788452,0.027404785,0.05340576,-0.004802704,-0.010551453,0.016937256,0.025238037,0.023345947,0.038238525,0.0012140274,0.04647827,0.013626099,-0.012672424,-0.034179688,0.0055389404,-0.026443481,-0.037139893,0.000667572,-0.021194458,-0.004383087,0.021011353,0.011871338,-0.009010315,-0.035736084,-0.014129639,-0.015304565,-0.019332886,0.027175903,-0.025634766,0.013290405,-0.026367188,0.00315094,0.011634827,-0.01687622,-0.031341553,-0.020706177,-0.0025672913,-0.0049972534,-0.051513672,0.01133728,-0.01977539,0.00844574,-0.00015974045,0.0073013306,-0.01399231,0.04849243,0.004886627,-0.0042686462,0.018981934,0.020355225,0.0036907196,0.016204834,0.03353882,-0.023834229,-0.030685425,-0.018997192,0.0041542053,-0.0048065186,0.025863647,-0.019973755,0.019378662,0.022277832,0.012420654,0.0004284382,0.0062942505,-0.02078247,0.002380371,-0.026275635,-0.018936157,0.015930176,0.028121948,-0.0076828003,-0.017196655,0.05319214,-0.008415222,-0.018051147,0.025558472,0.038482666,0.022644043,0.03427124,0.0036506653,-0.020614624,-0.03466797,-0.004966736,-0.038330078,0.0055351257,0.00064373016,-0.002149582,0.00894165,0.019699097,0.0051994324,0.0062828064,0.0007634163,0.025238037,0.016693115,-0.019882202,0.023910522,0.0066108704,0.010528564,-0.028640747,0.011375427,0.020629883,0.04660034,0.008087158,0.019012451,-0.010269165,0.016540527,-0.02357483,0.0035591125,0.011924744,-0.04425049,-0.028060913,0.0128479,-0.032318115,0.009613037,0.0037136078,0.013336182,-0.0025024414,0.01651001,-0.008842468,-0.046905518,-0.019378662,0.02154541,0.0006289482,0.00064468384,0.018692017,-0.018707275,-0.007785797,-0.0011539459,-0.01625061,-0.049743652,-0.019973755,-0.008270264,-0.013633728,0.023208618,0.0060272217,-0.020904541,-0.0060157776,-0.022842407,-0.0036239624,0.0055236816,0.018188477,-0.014305115,0.0053863525,0.020431519,0.025863647,-0.0021152496,0.015716553,-0.011367798,-0.0022258759,0.008338928,0.012359619,0.0014600754,-0.021362305,0.022628784,-0.008529663,0.007286072,0.030654907,-0.005092621,0.015914917,-0.017486572,0.0054473877,-0.0053367615,0.010269165,0.024383545,-0.018600464,-0.027282715,0.0041542053,-0.013710022,-0.03314209,-0.0034046173,0.017181396,0.029388428,-0.0063171387,0.048095703,-0.03363037,-0.020141602,-0.0059776306,-0.0090789795,-0.020828247,0.011146545,0.010528564,0.0030937195,-0.01651001,-0.008079529,-0.007843018,-0.030197144,-0.014381409,0.020690918,-0.023712158,0.019699097,0.020614624,0.015533447,0.033691406,0.0052490234,0.016067505,0.023452759,-0.0059928894,0.024017334,0.03366089,0.070129395,-0.014343262,-0.02861023,0.0029659271,0.008285522,-0.024749756,-0.0041275024,0.0070762634,0.009407043,-0.013008118,0.008911133,0.003484726,0.02130127,-0.011917114,0.0055236816,-0.021865845,0.0013666153,-0.019622803,-0.008995056,-0.04031372,0.0037822723,0.031463623,0.033294678,0.007637024,0.011451721,-0.025894165,0.041809082,0.03878784,-0.011543274,-0.049957275,-0.035491943,0.014518738,0.010116577,0.013519287,0.017303467,-0.020996094,-0.005706787,-0.00283432,0.010421753,-0.0024089813,-0.027572632,0.010528564,0.0158844,0.008300781,0.009780884,0.035369873,-0.011116028,-0.003068924,-0.0046577454,-0.0050086975,0.029449463,0.029418945,-0.003162384,0.029037476,0.0056610107,-0.03213501,0.049621582,-0.017166138,0.028060913,-0.014801025,0.011924744,-0.037261963,-0.019058228,-0.022201538,0.006477356],"createdAt":"2026-04-21T18:32:09.836Z","updatedAt":"2026-04-22T18:04:46.517Z","lastSeenAt":"2026-04-22T18:04:46.517Z","tsv":"'/api/v1/ehr/53':38 '/ehr/53':68 '0.02':9,26,130,145 '000':136 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':158 '20':135 '300':161 '6':143 'EHR API' 'access':73,175 'actual':235 'addit':196 'address':157 'advertis':166 'ai':111 'among':104 'analyt':110 'anywher':222 'api':15,32,55,72,107,168,183 'base':7,24,61,137,155 'base-network' 'call':54 'categori':108 'challeng':77,125 'collect':46 'connect':191 'content':197 'data':81,109,211 'decim':144 'descript':208 'determin':233 'difficult':231 'doc':181 'document':106,176 'ehr':4,21,86 'ehr-data' 'ehr/53':217 'electron':90 'electronic health records' 'endpoint':5,22,36,103,117,214 'exact':80,152 'extrem':178 'financ':113 'function':236 'gate':3,20 'health':91 'health data endpoint' 'infrastructur':115 'instant':174 'key':16,33,169 'label':70 'land':97,227 'limit':172 'list':101 'live':119 'lowpaymentfee' 'lowpaymentfee.com':43 'made':148 'make':229,238 'maxamountrequir':133 'medical records API' 'mention':221 'ml':112 'network':62 'no-api-key' 'openapi':201 'page':98,186,228 'paid':240 'part':40 'particular':213 'path':67,87,218 'pay':8,25,52 'pay-per-cal':51 'pay-per-call health API' 'pay-per-request' 'payload':82 'payment':146 'per':10,27,53,131 'platform':44,165 'post':127 'premium':71 'price':128,182 'prompt':193 'protocol':50 'provid':95 'rate':171 'readm':185 'record':92 'render':188 'request':11,28,132,241 'request/response':204 'requir':17,34 'resourc':65 'return':121,215 'schema':205 'scheme':153 'second':162 'segment':88 'settl':56 'site':225 'spars':179 'spec':202 'specif':64 'suggest':89 'though':93 'timeout':163 'unclear':84 'unit':138 'usdc':13,30,58,140 'usdc-settlement' 'valid':123 'via':149 'wallet':192 'web3':114 'without':237 'x402':2,19,49,76,124,151 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"21b2b4bf-459a-4dda-803d-06b332d39e96","listingId":"4cf1bf9b-c1b1-44ed-9b8f-9e863f8d8010","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/ehr/53","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.836Z"}],"sources":[{"listingId":"4cf1bf9b-c1b1-44ed-9b8f-9e863f8d8010","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/53","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.836Z","lastSeenAt":"2026-04-22T18:04:46.517Z"}],"details":{"listingId":"4cf1bf9b-c1b1-44ed-9b8f-9e863f8d8010","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/53 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/53"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/53"},{"claim":"The /ehr/53 endpoint is not listed among the provider's documented API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving health record data (EHR) for record ID 53 via a single paid API call","Integrating pay-per-request health data into agent workflows without managing API keys","Programmatic access to EHR data settled on-chain via USDC on Base"],"bestFor":["Agents or developers needing on-demand EHR data without subscription commitments","x402-compatible wallets and agent frameworks on Base","Low-volume, pay-as-you-go health data retrieval"],"notFor":["High-volume bulk EHR data extraction (no documented batch endpoints)","Users who need detailed API documentation or response schemas before purchasing","Applications requiring HIPAA-compliant audit trails (no compliance documentation provided)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.005Z"},"updatedAt":"2026-04-22T18:04:46.517Z"}}