{"id":"3a4b7bc0-a28a-43c1-a6d7-a97f67b424f6","shortId":"gwF2xU","kind":"x402","title":"Mortgage data API endpoint on Base, pay-per-call via x402 with USDC.","tagline":"Mortgage data API endpoint on Base, pay-per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides mortgage-related data via a POST request to `/api/v1/mortgages/15`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated by the x402 payment protocol on the Base network.\n\nThe specific `/api/v1/mortgages/15` endpoint is not listed on the provider's homepage among the advertised API categories, though the site's general pricing model is $0.02 per request. The x402 challenge for this endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (token contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base, 6 decimals), which equals $0.02 USD — consistent with the site-wide pricing. Payment is made via the x402 `exact` scheme directly in the HTTP request header; no API keys or accounts are required.\n\nDocumentation is extremely sparse. The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the mortgage endpoint actually returns. The path segment `15` may refer to a 15-year mortgage product or a specific resource ID, but this is unconfirmed. Callers should expect a JSON response (`mimeType: application/json`) but the exact schema is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","mortgage-data","json-api","no-api-key"],"categories":["finance"],"synonyms":["mortgage API","mortgage rates","mortgage calculator","home loan data","15-year mortgage","real estate finance API","x402 mortgage"],"warnings":["No documentation available — docs, pricing, and README pages all render only a wallet-connect prompt","The /api/v1/mortgages/15 endpoint is not listed among the provider's advertised APIs on the homepage","No request or response schema is provided; callers cannot know what to send or expect back","The meaning of '15' in the path (resource ID vs. 15-year mortgage) is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/mortgages/15","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/mortgages/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge) and pricing is clear at $0.02/request in USDC on Base. However, there is no documentation, no request/response schema, and the mortgage endpoint isn't even listed on the provider's own homepage. The purpose and output of this specific endpoint are entirely 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":"2026-04-19T05:53:36.830Z","embedding":[-0.021636963,0.033294678,0.04434204,0.044891357,-0.007255554,-0.006465912,-0.017074585,0.015823364,0.052978516,-0.06124878,0.004196167,-0.09320068,-0.037750244,-0.03253174,-0.043945312,0.026016235,0.010971069,0.008110046,-0.046936035,0.023635864,0.048461914,-0.029815674,-0.02192688,0.010635376,0.00642395,0.007713318,-0.04336548,-0.015602112,0.0015258789,-0.0118637085,0.0028095245,-0.018966675,0.0021133423,0.020111084,-0.00983429,0.029830933,-0.010131836,0.029190063,0.025024414,-0.0256958,0.0023269653,-0.04171753,0.008293152,-0.009857178,-0.05432129,-0.005443573,-0.0059890747,-0.032073975,-0.0061912537,0.007545471,-0.027832031,-0.018981934,-0.02130127,0.021530151,0.02519226,-0.031982422,0.030929565,-0.014175415,0.005973816,0.00737381,0.0056381226,-0.08093262,-0.029190063,-0.03363037,0.0022354126,0.026260376,-0.0158844,0.07562256,0.010879517,0.083496094,0.020767212,0.03878784,0.026031494,0.026107788,0.02142334,-0.03878784,-0.01676941,0.052612305,-0.03970337,-0.015365601,-0.013961792,-0.02178955,-0.04006958,-0.021499634,0.001868248,-0.022766113,0.0022468567,0.018585205,-0.061553955,0.040283203,-0.07055664,0.0069999695,-0.005695343,-0.007259369,0.020614624,-0.028045654,-0.032958984,0.027526855,0.011619568,0.0011444092,0.0069236755,-0.034942627,0.018814087,-0.021881104,0.05026245,0.0056915283,0.036590576,0.020080566,-0.0024986267,-0.020446777,-0.022369385,0.0069389343,0.0004348755,-0.01335144,0.017913818,0.024124146,-0.0501709,0.014373779,-0.04034424,0.0071105957,-0.0491333,0.04458618,0.017715454,0.015701294,0.039031982,0.006374359,0.035583496,0.022949219,-0.03060913,0.000024557114,0.010398865,-0.00020337105,-0.008392334,-0.005393982,-0.029830933,0.023788452,-0.024505615,-0.0087890625,-0.047546387,0.0014896393,0.042510986,-0.04473877,0.039978027,0.048461914,-0.061157227,0.0028038025,-0.027297974,0.0109939575,-0.017807007,-0.049316406,0.024398804,0.015075684,-0.019073486,-0.036987305,0.0011463165,-0.04385376,0.0046844482,0.0231781,-0.022201538,0.054595947,-0.015487671,0.016616821,0.044189453,0.017120361,0.013153076,0.045013428,0.0262146,-0.07165527,-0.057678223,-0.015274048,0.00013065338,-0.024902344,-0.018447876,-0.017471313,-0.019866943,-0.0025196075,-0.016937256,-0.023727417,0.016937256,-0.050842285,0.0030288696,-0.03894043,-0.0064353943,0.0026950836,-0.037506104,-0.03918457,-0.026855469,0.077819824,0.014579773,0.046081543,0.0181427,-0.024017334,0.02532959,0.020080566,-0.016967773,-0.016235352,0.028274536,-0.028823853,0.034973145,-0.016952515,0.011627197,-0.04034424,0.04421997,0.036468506,0.014259338,-0.020446777,-0.023483276,-0.022003174,-0.049591064,-0.010375977,0.013946533,0.018005371,0.016036987,0.021362305,-0.012557983,-0.040496826,0.0077323914,-0.028152466,0.017852783,0.051940918,0.030334473,-0.007286072,0.010734558,0.010299683,-0.048217773,0.024719238,0.007247925,-0.004032135,-0.016220093,-0.023361206,0.045288086,0.02609253,-0.025787354,-0.005760193,0.0019817352,0.023757935,0.00007271767,0.0021018982,-0.00041270256,0.01234436,-0.034057617,-0.02973938,-0.00056886673,0.02166748,-0.019577026,-0.00932312,-0.03466797,-0.106933594,0.05267334,0.044128418,0.038330078,-0.016479492,-0.010528564,-0.0010538101,-0.037231445,-0.054901123,0.015792847,0.09161377,-0.0036525726,-0.03265381,0.015853882,0.00868988,-0.043426514,-0.013046265,-0.028839111,-0.031280518,-0.033325195,0.005744934,-0.034362793,-0.011924744,0.020965576,0.022628784,0.050079346,-0.01411438,-0.043029785,0.011306763,-0.027130127,0.014816284,-0.03704834,-0.0020275116,0.035461426,-0.00919342,0.06137085,0.018844604,0.002981186,0.011817932,-0.0071792603,-0.0058555603,-0.012832642,-0.007881165,-0.033325195,0.010925293,0.009544373,-0.062408447,-0.0028972626,0.0013685226,0.023391724,-0.047943115,0.043029785,0.0077056885,0.03616333,0.053710938,0.015090942,-0.047058105,0.014274597,0.023132324,0.025253296,0.0418396,0.011108398,-0.0037021637,-0.01864624,0.06518555,-0.021194458,-0.0027046204,0.020767212,-0.0005097389,0.03982544,-0.016601562,-0.03237915,-0.05331421,-0.022903442,-0.034301758,0.0037174225,-0.034362793,0.0013570786,-0.010688782,-0.0011701584,-0.008201599,-0.031585693,-0.04626465,0.026809692,-0.023880005,0.006641388,-0.02911377,-0.031173706,0.034484863,0.01725769,-0.012886047,0.02784729,0.03692627,0.024032593,-0.006000519,-0.01348114,-0.017456055,-0.038970947,-0.0137786865,0.019744873,-0.021453857,0.0018510818,0.009399414,-0.06707764,0.013626099,0.026260376,0.024398804,0.0053749084,0.015274048,-0.0056610107,-0.031463623,-0.05709839,-0.02709961,-0.02268982,0.0046577454,-0.006526947,0.013504028,0.06298828,0.0017852783,0.02822876,-0.024154663,0.045288086,-0.052124023,-0.020843506,0.037109375,-0.06689453,-0.027557373,0.0016460419,0.001033783,-0.015914917,0.020828247,0.052734375,0.0051956177,0.08203125,0.019851685,-0.039398193,-0.008354187,0.04071045,0.024765015,-0.0010480881,0.00032901764,-0.025436401,-0.032348633,0.017745972,-0.013313293,0.0033626556,-0.053710938,0.039398193,0.025909424,0.080444336,0.020263672,0.029083252,0.013053894,-0.021484375,-0.025436401,-0.039398193,-0.022705078,-0.04260254,-0.031921387,0.033172607,-0.019927979,-0.0066566467,-0.029953003,0.04421997,-0.019714355,0.020401001,-0.02998352,-0.0009508133,0.004550934,-0.002506256,0.023239136,0.0021572113,0.03265381,0.032196045,-0.031982422,0.016326904,0.0047569275,-0.044647217,0.027679443,0.041748047,-0.006576538,-0.029312134,-0.03564453,-0.020904541,0.0019054413,-0.0035533905,-0.03277588,-0.004878998,0.015289307,0.013679504,0.047729492,-0.00806427,-0.0134887695,0.0033111572,-0.02368164,-0.057281494,-0.036010742,-0.056854248,-0.0021896362,0.047576904,-0.026733398,-0.0178833,0.009399414,-0.014717102,-0.007080078,0.009422302,0.012252808,0.02078247,-0.0340271,0.021331787,-0.020568848,-0.000024199486,0.010932922,0.026763916,-0.006702423,0.012580872,-0.007820129,0.02571106,-0.032928467,-0.030014038,0.03286743,-0.06750488,-0.0014657974,0.03567505,-0.04055786,-0.018447876,0.01902771,-0.03768921,-0.025039673,0.0045280457,-0.041809082,0.028366089,0.03366089,-0.033721924,-0.015853882,-0.055603027,0.022094727,-0.0042915344,0.08105469,0.015014648,0.0020618439,-0.03591919,0.023376465,0.037384033,0.0025234222,0.0026378632,-0.013114929,-0.017333984,-0.0042304993,-0.013183594,-0.031021118,-0.02027893,0.04058838,0.0052871704,0.00046896935,0.023513794,0.0006079674,-0.013031006,0.029159546,-0.015930176,0.03237915,-0.041381836,0.051818848,-0.01737976,0.048217773,0.009788513,-0.011306763,-0.041931152,0.041229248,-0.0029067993,0.040008545,-0.041809082,-0.0036888123,0.00047898293,0.014083862,0.0029468536,-0.00086402893,-0.017791748,-0.013977051,-0.032440186,-0.079956055,0.03930664,-0.012718201,0.02217102,0.04824829,0.023498535,0.043518066,0.0006933212,0.0023288727,0.015838623,-0.015342712,-0.006752014,-0.03857422,-0.018096924,-0.016983032,0.0060272217,-0.019805908,0.006046295,0.01626587,0.029067993,-0.011924744,-0.013504028,-0.00015771389,0.041168213,0.011108398,0.024841309,0.014221191,0.01725769,0.06488037,0.020523071,-0.031082153,0.024215698,-0.0052375793,0.016342163,-0.005504608,0.03250122,0.04269409,-0.015403748,-0.002922058,-0.007881165,0.0028572083,-0.02508545,-0.005493164,0.0022830963,0.008758545,0.0024108887,-0.01550293,0.015686035,0.0137786865,-0.027008057,-0.0075569153,0.032226562,0.0043754578,-0.020431519,0.018356323,0.019607544,0.034362793,-0.030136108,0.0028686523,0.0152282715,0.061065674,0.028625488,-0.007320404,0.0040130615,0.006275177,0.0007972717,0.005680084,0.015640259,-0.021621704,0.03366089,-0.008758545,0.0067825317,0.0028877258,0.005344391,-0.036102295,0.023544312,0.0072784424,-0.0152282715,-0.003528595,-0.00982666,0.018356323,0.01928711,-0.005176544,-0.0063476562,0.016906738,-0.0154418945,-0.008956909,0.011497498,0.055389404,-0.008155823,0.00819397,0.018493652,-0.008155823,0.015625,-0.040618896,0.021774292,0.0317688,0.025421143,-0.039245605,-0.049438477,-0.038513184,-0.013542175,0.03503418,-0.0019006729,0.014137268,0.031585693,-0.0073547363,-0.0006842613,0.060272217,0.0016927719,-0.008605957,-0.034606934,-0.034484863,-0.016113281,0.0008392334,0.0039711,-0.020645142,0.011299133,-0.014808655,-0.020370483,0.007156372,-0.042053223,-0.016723633,0.022644043,0.0020599365,0.020385742,-0.02319336,0.017456055,-0.0096588135,-0.05996704,-0.010032654,0.019058228,0.023773193,-0.037200928,0.028244019,-0.027832031,0.0009393692,-0.008934021,0.044952393,0.029815674,0.004547119,0.0020980835,0.026901245,-0.026367188,0.026763916,-0.016860962,0.014221191,-0.0011014938,-0.019134521,0.020431519,-0.026306152,-0.013191223,0.014183044,-0.015014648,-0.004711151,-0.026977539,-0.062408447,0.008094788,-0.02079773,0.04156494,0.030334473,0.033813477,-0.021652222,0.022262573,0.011024475,0.015129089,-0.0030288696,0.0066452026,-0.015823364,0.0056991577,0.03930664,0.020019531,-0.00497818,-0.02923584,0.001739502,-0.012084961,-0.033996582,-0.0143966675,-0.010726929,-0.012893677,0.0014352798,-0.007801056,-0.040802002,0.0015420914,-0.0055618286,-0.026260376,0.0051345825,0.01687622,0.008644104,0.00061416626,-0.011154175,0.015899658,0.019104004,-0.0042762756,0.018936157,0.016738892,-0.013168335,-0.0019836426,0.009628296,0.004196167,0.02923584,0.018188477,-0.026657104,-0.016342163,-0.008300781,-0.059326172,-0.0070877075,0.0041389465,-0.020217896,-0.008491516,-0.00712204,-0.051086426,-0.002216339,-0.02494812,-0.009437561,-0.0074157715,0.003063202,0.025863647,-0.00024008751,0.02381897,-0.014442444,-0.025741577,-0.011154175,0.017990112,0.009025574,0.005077362,0.021972656,0.017059326,-0.022827148,-0.0059814453,0.015045166,0.011131287,-0.009155273,-0.005344391,-0.0012426376,-0.009361267,-0.000995636,-0.014816284,-0.018112183,-0.03845215,0.00223732,0.08459473,-0.01727295,0.0057640076,-0.004020691,-0.03074646,-0.005001068,0.03604126,-0.052368164,0.012001038,-0.0039634705,0.0040626526,-0.021957397,0.031173706,0.006526947,0.031051636,-0.03567505,-0.04776001,0.012893677,0.014259338,-0.013748169,-0.058441162,-0.040924072,-0.05633545,0.0043296814,0.00082683563,-0.037200928,-0.0005130768,0.012481689,-0.013381958,-0.07299805,-0.011260986,0.031311035,0.0030403137,0.0027580261,0.012458801,0.012496948,0.014259338,0.0053253174,-0.012260437,0.016647339,0.0022583008,-0.009017944,-0.014518738,0.031982422,-0.00030636787,-0.018676758,0.021484375,0.009468079,0.031280518,-0.00060892105,0.016815186,0.0025234222,0.0009589195,-0.009231567,0.01461792,-0.019058228,-0.014434814,0.049743652,-0.060668945,0.01902771,0.00945282,0.014175415,-0.0019760132,0.016342163,0.018463135,-0.0390625,-0.009140015,0.019317627,0.03314209,0.037200928,-0.029815674,0.037353516,0.0061149597,-0.0025920868,0.017807007,-0.008888245,-0.0011959076,-0.03781128,-0.030090332,-0.00088977814,0.029830933,0.010246277,-0.011154175,0.0045547485,-0.0069236755,-0.017654419,-0.008964539,-0.01134491,-0.021118164,-0.010070801,0.0002632141,-0.0066070557,-0.00868988,-0.023330688,0.033691406,0.020629883,0.039764404,0.018295288,-0.021118164,-0.013168335,0.015304565,-0.0065231323,-0.0005092621,0.020584106,0.009895325,0.0051879883,0.034820557,0.032348633,-0.038757324,-0.0073394775,-0.030090332,-0.016098022,0.015075684,-0.008842468,0.008590698,-0.017150879,0.000808239,-0.0065956116,-0.036590576,-0.00856781,-0.04953003,-0.029708862,0.00015282631,0.0046806335,0.0047950745,0.008338928,-0.005378723,0.009475708,-0.019073486,0.028030396,0.012771606,-0.02456665,0.03060913,0.025161743,-0.024246216,-0.041107178,-0.0005645752,-0.0023384094,-0.0014238358,0.015777588,-0.02456665,0.04168701,0.05609131,0.021057129,0.0029067993,0.015449524,0.035583496,0.0031337738,0.0050086975,-0.0035247803,0.034179688,-0.011245728,0.024795532,-0.036834717,0.023330688,0.030059814,0.0010871887,-0.014907837,-0.007080078,0.0026397705,0.054748535,-0.0042304993,-0.006614685,0.022460938,-0.013549805,0.033294678,-0.012237549,-0.0042800903,-0.016860962,-0.014572144,-0.025741577,0.02911377,-0.0004389286,-0.0039634705,0.024032593,-0.024841309,0.03692627,-0.026733398,0.0012407303,0.01109314,0.00630188,-0.015716553,-0.014831543,0.008415222,-0.016845703,-0.036254883,-0.008781433,0.008224487,0.03744507,0.007320404,0.014640808,0.013725281,-0.009887695,0.030410767,0.004306793,-0.018188477,-0.015342712,-0.022583008,0.046447754,-0.024291992,0.08526611,0.035980225,0.00072813034,0.05911255,0.026367188,0.04449463,-0.009643555,0.031982422,-0.015548706,0.033325195,-0.04095459,0.003238678,0.020111084,0.02835083,-0.011680603,0.010070801,-0.003932953,0.030151367,-0.031021118,0.03050232,0.04925537,0.034118652,0.002796173,0.027328491,-0.0045776367,-0.0050354004,-0.020507812,-0.020462036,0.04168701,0.01701355,0.031173706,0.02166748,0.0018014908,0.008041382,0.01235199,-0.027023315,-0.03048706,0.066711426,0.056793213,-0.04171753,-0.01474762,-0.02230835,-0.008453369,-0.035369873,-0.016220093,-0.0053863525,0.0087890625,0.012275696,-0.029708862,-0.0006017685,-0.028030396,0.0024604797,0.032104492,0.017837524,-0.0050354004,0.023117065,0.00504303,0.024963379,0.029541016,-0.0006637573,-0.00034689903,-0.0033779144,-0.035705566,0.025299072,0.030944824,-0.0146102905,-0.007270813,0.02079773,-0.016204834,0.03527832,0.03475952,-0.01914978,-0.0076828003,0.028274536,0.022872925,0.0029659271,0.039001465,0.026809692,0.022384644,0.039916992,0.031921387,0.02204895,-0.019927979,0.022872925,-0.002817154,0.014640808,-0.010597229,0.025894165,0.017929077,-0.002090454,0.01574707,-0.030899048,-0.001742363,0.013664246,0.018722534,-0.0066223145,-0.014434814,0.0014343262,0.049926758,-0.016586304,0.0077438354,-0.00092983246,-0.007820129,0.018722534,0.016586304,0.005706787,-0.018127441,0.030578613,0.014335632,0.0013198853,-0.03552246,0.043060303,-0.038024902,0.020126343,-0.0129470825,-0.018249512,-0.017822266,0.017929077,-0.004219055,0.020385742,0.001909256,-0.005428314,-0.01927185,-0.006843567,0.02722168,0.002450943,-0.000038206577,-0.012207031,-0.013130188,0.0020256042,0.028686523,0.00017213821,0.0015001297,-0.010360718,-0.007507324,0.0051956177,-0.008239746,-0.017471313,-0.008026123,0.015731812,-0.038085938,0.03010559,0.027023315,0.011642456,0.023330688,-0.012870789,0.006038666,0.018325806,0.0035591125,0.026184082,0.015144348,-0.024932861,0.012870789,-0.00447464,0.045013428,0.034210205,0.0093307495,0.026809692,-0.0015993118,-0.017837524,0.0206604,0.0022144318,0.034423828,0.0018930435,-0.018005371,0.007205963,0.031204224,-0.023590088,-0.04333496,-0.0054130554,-0.028274536,-0.024795532,-0.01335144,0.022827148,0.0015830994,0.031585693,0.037963867,0.01902771,-0.040100098,0.058044434,-0.009391785,0.04119873,-0.0060310364,-0.0030536652,0.04647827,0.015945435,0.026565552,0.009880066,0.0064048767,-0.042266846,0.0029964447,0.016159058,0.026168823,0.020843506,-0.0025558472,0.0065727234,0.03062439,-0.00957489,0.058044434,0.0065574646,-0.002904892,0.022705078,-0.008155823,-0.02330017,-0.0121154785,-0.019821167,0.020095825,0.05444336,-0.0043792725,-0.0110321045,-0.014656067,-0.01600647,0.010696411,-0.0013027191,0.012535095,0.014831543,-0.020126343,0.02168274,-0.041412354,-0.0017642975,-0.00932312,0.021316528,-0.06488037,-0.027297974,0.006542206,0.012023926,-0.03857422,0.027893066,0.031921387,-0.0024929047,-0.010498047,0.03265381,-0.014640808,0.04949951,-0.014968872,0.024551392,0.046691895,0.009819031,-0.012504578,0.0014009476,0.019958496,-0.04006958,0.013450623,0.013389587,-0.01777649,0.0134887695,-0.0034255981,0.013702393,-0.0024166107,-0.005443573,-0.013191223,0.0013980865,0.008895874,0.0018568039,-0.007534027,0.03793335,-0.00299263,0.010932922,0.0011978149,-0.017196655,0.028671265,0.0390625,0.014320374,-0.025772095,-0.013183594,0.0056648254,-0.012054443,-0.009902954,0.005794525,0.00089359283,-0.042999268,-0.006259918,0.022583008,0.01878357,0.0011825562,-0.021514893,-0.015808105,0.013046265,0.017196655,0.023712158,0.004196167,-0.02078247,0.0317688,-0.0262146,-0.020812988,-0.00035572052,-0.00818634,0.034606934,0.031799316,-0.006614685,-0.031204224,0.02583313,-0.017929077,0.024505615,0.019851685,0.00063562393,0.020599365,-0.018341064,-0.01701355,-0.005153656,0.016708374,-0.013015747,-0.028244019,-0.035705566,0.011650085,0.026809692,-0.003042221,-0.010025024,0.021728516,0.013130188,0.012969971,0.032104492,0.0021533966,0.045959473,0.040740967,-0.009178162,-0.016403198,-0.009033203,-0.020507812,-0.020095825,0.010292053,-0.02180481,-0.007537842,0.021636963,0.028762817,0.0039482117,-0.0030574799,-0.008255005,-0.0073280334,-0.023254395,0.010627747,-0.023910522,0.007572174,-0.033447266,-0.00042963028,0.018295288,0.0030403137,-0.022033691,-0.014274597,0.018157959,-0.02027893,-0.046173096,0.0006017685,-0.014312744,0.007118225,-0.025360107,0.000872612,-0.008773804,0.018463135,-0.013145447,-0.009857178,0.015602112,0.053619385,-0.010719299,-0.0028743744,0.00919342,-0.017990112,-0.0103302,-0.014183044,0.00096416473,-0.016448975,0.027801514,0.0051956177,0.011619568,0.039398193,-0.01084137,0.00045752525,-0.018478394,-0.000003516674,-0.00642395,-0.019927979,-0.01486969,0.008956909,0.0060920715,-0.008476257,0.01663208,0.017333984,-0.0082092285,-0.020965576,0.029342651,0.043273926,0.024978638,0.033447266,0.007713318,0.018066406,-0.029891968,0.009269714,-0.015853882,0.023620605,-0.0063476562,-0.0152282715,-0.011451721,0.0019264221,0.008926392,0.019180298,-0.004890442,0.014160156,0.019058228,0.029067993,0.014709473,-0.002090454,-0.009521484,-0.027023315,-0.022964478,0.011184692,0.04837036,-0.011917114,0.015068054,0.0368042,0.020050049,-0.038085938,-0.0127334595,0.009094238,0.0006623268,-0.042999268,-0.0049934387,-0.024505615,0.031982422,-0.0031795502,0.009132385,-0.015548706,0.004459381,0.014968872,-0.04168701,-0.027954102,0.027374268,0.010887146,-0.0031833649,-0.002412796,-0.0051956177,-0.0071411133,-0.003791809,-0.012298584,-0.039245605,-0.013206482,-0.007068634,-0.011917114,0.038024902,0.005924225,-0.015625,-0.0090789795,0.009117126,0.014045715,-0.0087890625,0.0049552917,-0.0071792603,-0.035491943,-0.0005540848,0.022155762,-0.008392334,-0.011131287,-0.013442993,-0.009277344,0.0011196136,-0.034576416,0.030303955,-0.024383545,0.01928711,-0.008628845,-0.036712646,0.02998352,-0.007774353,0.02305603,-0.01638794,-0.021530151,-0.0024814606,0.00045609474,0.027801514,-0.014732361,-0.010269165,0.008155823,-0.019012451,-0.028030396,0.0061683655,0.0029067993,-0.00068330765,-0.01727295,0.038391113,-0.008628845,-0.023391724,0.018157959,-0.0032215118,-0.013938904,0.010169983,0.0181427,-0.0053215027,0.014533997,-0.0075950623,-0.0045280457,-0.011550903,-0.023101807,0.0043144226,-0.009643555,-0.004119873,0.03100586,0.0024147034,0.036499023,0.015914917,0.033447266,0.016189575,-0.009170532,0.044799805,0.030853271,0.019042969,0.0051498413,-0.007270813,-0.0012540817,0.004108429,-0.004383087,-0.0061683655,-0.0025463104,-0.012931824,-0.04135132,0.02330017,-0.013916016,-0.00015890598,0.0006556511,0.017501831,-0.02835083,0.02911377,-0.024230957,-0.030334473,-0.02696228,-0.0023918152,0.031707764,0.01134491,0.021240234,-0.009315491,-0.027053833,0.018630981,0.05593872,-0.004257202,-0.031982422,-0.021514893,0.026977539,0.002954483,0.019180298,0.018814087,-0.026901245,-0.017852783,-0.01360321,-0.018356323,0.012809753,-0.012519836,0.030700684,0.01285553,-0.018936157,-0.0028457642,0.034210205,-0.007926941,0.0079422,0.0025405884,-0.011749268,0.043518066,0.036315918,0.007209778,0.019714355,0.011726379,-0.05154419,0.032714844,0.011054993,0.025985718,-0.0013389587,-0.013069153,-0.05154419,-0.008659363,-0.010726929,-0.0029945374],"createdAt":"2026-04-18T18:48:13.624Z","updatedAt":"2026-04-29T05:34:22.108Z","lastSeenAt":"2026-04-29T05:34:22.108Z","tsv":"'/api/v1/mortgages/15':43,85 '0.02':108,136 '000':122 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':129 '15':209,214 '15-year mortgage' '20':121 '6':132 'account':163 'actual':204 'advertis':97 'ai/ml':65 'among':95 'analyt':64 'api':3,17,60,98,160 'application/json':234 'base':6,20,81,123,131 'broader':49 'call':10,24 'caller':227 'categori':99 'challeng':113 'connect':181 'consist':138 'content':187 'contract':128 'crawl':171 'crypto':68 'data':2,16,37,63 'decim':133 'descript':198 'direct':153 'doc':172 'document':166 'dozen':54 'endpoint':4,18,30,61,86,116,203 'equal':135 'exact':151,237 'exampl':195 'expect':229 'extrem':168 'financ':67 'gate':73 'general':104 'header':158 'home loan data' 'homepag':94 'http':156 'id':222 'infer':66 'json':231 'json-api' 'key':161 'list':89 'lowpaymentfee.com':32,51 'made':147 'maxamountrequir':119 'may':210 'mimetyp':233 'model':106 'mortgag':1,15,35,202,216 'mortgage API' 'mortgage calculator' 'mortgage rates' 'mortgage-data' 'mortgage-rel':34 'network':82 'no-api-key' 'offer':53 'openapi':191 'page':176 'part':46 'path':207 'pay':8,22,57 'pay-per-cal':7,21 'pay-per-request':56 'payment':77,145 'per':9,23,58,109 'platform':50 'post':40 'price':105,144,173 'product':217 'prompt':183 'protocol':78 'provid':33,92 'readm':175 'real estate finance API' 'refer':211 'relat':36 'request':41,59,110,157 'request/response':194 'requir':165 'resourc':221 'respons':232 'return':178,205 'schema':192,238 'scheme':152 'segment':208 'servic':71 'show':117 'site':102,142 'site-wid':141 'span':62 'spars':169 'specif':84,220 'substant':186 'though':100 'token':127 'unconfirm':226 'unit':124 'unknown':240 'usd':137 'usdc':14,28,126 'usdc-base' 'util':70 'via':11,25,38,148 'wallet':182 'wide':143 'x402':12,26,76,112,150 'x402 mortgage' 'x402-payment' 'year':215","prices":[{"id":"0d335f14-ef02-4580-9da7-fb9b2b8aa379","listingId":"3a4b7bc0-a28a-43c1-a6d7-a97f67b424f6","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/mortgages/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:48:13.624Z"}],"sources":[{"listingId":"3a4b7bc0-a28a-43c1-a6d7-a97f67b424f6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/mortgages/15","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:48:13.624Z","lastSeenAt":"2026-04-29T05:34:22.108Z"}],"details":{"listingId":"3a4b7bc0-a28a-43c1-a6d7-a97f67b424f6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/mortgages/15 \\\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 site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/mortgages/15"},{"claim":"Docs, pricing, and README pages return only a Connect wallet prompt with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving mortgage-related data or calculations programmatically","Integrating mortgage information into financial dashboards or tools","Agent-driven mortgage data lookups with instant crypto micropayments"],"bestFor":["Developers needing on-demand mortgage data without subscription commitments","AI agents that can settle x402 payments on Base for per-call access","Applications requiring low-cost, keyless API access to financial data"],"notFor":["Users who need detailed API documentation or guaranteed schema stability","Bulk mortgage data consumers who need high-volume batch access at lower unit cost","Anyone unable to pay with USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:13.352Z"},"updatedAt":"2026-04-29T05:34:22.108Z"}}