{"id":"ca2adfa9-107b-46a5-a7d3-30afd43100a2","shortId":"ev7t4Q","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per call, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/39` appears to be a Stripe invoice-related resource. The x402 challenge confirms it is live, accepts POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…0913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely via the x402 payment header.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what this specific invoice endpoint returns or what input it expects beyond a POST body. The platform's landing page lists many endpoints but provides no per-endpoint documentation. The actual behavior and response format of this endpoint must be discovered empirically.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","stripe-invoices","post-endpoint","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto-gated endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request body or response format for this endpoint.","The specific purpose and output of /api/v1/stripe/invoices/39 is undocumented and must be discovered empirically.","The endpoint path references a specific invoice ID (39), which may be a demo or placeholder resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/39","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/stripe/invoices/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The purpose of this specific Stripe invoice endpoint is unclear beyond its title. This is effectively a stub listing.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T10:33:35.319Z","embedding":[-0.02394104,-0.00945282,0.014862061,-0.011955261,0.012901306,-0.022766113,-0.024169922,0.018798828,0.042510986,-0.07006836,0.020248413,-0.028030396,-0.057617188,-0.04736328,-0.022232056,0.026626587,-0.017333984,0.023162842,-0.054534912,0.0552063,0.040893555,0.0015487671,-0.008216858,0.029342651,-0.015945435,-0.018173218,-0.019500732,-0.0317688,-0.0064697266,-0.02168274,0.022750854,-0.025405884,-0.0052833557,0.0035877228,0.0048065186,0.011489868,0.008369446,0.056671143,0.020324707,-0.011894226,-0.018356323,-0.05279541,0.007881165,-0.00932312,-0.007549286,0.0026550293,0.03152466,-0.007987976,-0.008735657,0.014442444,-0.04083252,-0.00083065033,0.0052490234,-0.01991272,0.012138367,0.023345947,0.016662598,-0.009254456,0.008712769,0.021438599,0.029174805,-0.07775879,-0.017608643,-0.01612854,0.0021839142,0.06817627,-0.012039185,0.07043457,0.014053345,0.037902832,0.011489868,0.07116699,0.028076172,0.019851685,-0.011947632,-0.036346436,0.014801025,0.059051514,-0.0072631836,0.010238647,-0.014419556,-0.021560669,-0.07824707,-0.014839172,-0.018432617,-0.059051514,-0.043151855,-0.02104187,-0.030151367,0.027526855,-0.10308838,-0.016448975,0.0020580292,0.007007599,0.0053100586,-0.020706177,-0.050323486,-0.003271103,-0.017791748,0.016418457,0.022064209,-0.025741577,0.011962891,0.0056114197,0.040618896,0.042877197,0.046081543,0.034088135,-0.018997192,-0.014053345,-0.026824951,0.032043457,0.0041236877,-0.041778564,0.017303467,0.006706238,-0.023452759,0.026397705,-0.018081665,0.0063209534,-0.055786133,0.043762207,-0.028396606,-0.001414299,0.012168884,-0.047088623,-0.018218994,-0.007282257,-0.04220581,-0.019729614,0.008110046,0.017364502,0.011650085,-0.025939941,-0.029678345,0.013137817,-0.008239746,-0.0104522705,-0.046417236,-0.015655518,0.029174805,-0.025680542,0.02708435,0.024093628,-0.08111572,-0.019042969,-0.055786133,0.018508911,-0.03643799,-0.012367249,0.016448975,0.03616333,0.0029296875,-0.016921997,-0.037261963,-0.0062789917,0.0014104843,0.0059280396,0.0014677048,0.02519226,-0.021835327,0.019134521,0.05331421,0.023910522,0.021530151,0.04360962,-0.0066604614,-0.0904541,-0.0680542,-0.009819031,-0.0028476715,-0.02142334,-0.041137695,0.0037384033,-0.007686615,-0.047454834,-0.02760315,-0.016967773,0.014801025,-0.055633545,-0.015602112,-0.0051078796,-0.0033893585,-0.014953613,-0.06072998,-0.020736694,-0.022521973,0.040527344,0.031311035,0.039764404,0.026733398,-0.005672455,0.04598999,0.0262146,0.0021305084,-0.0440979,0.031829834,-0.018447876,0.025466919,0.0033226013,0.015060425,-0.031036377,0.020751953,0.06088257,0.011367798,-0.015258789,-0.004009247,-0.02482605,-0.017303467,-0.014823914,0.009361267,0.01537323,-0.017242432,-0.0039978027,-0.032348633,-0.029464722,-0.01687622,0.0115356445,0.045562744,0.028030396,0.0061149597,0.0115356445,0.010566711,0.016860962,-0.011405945,0.053649902,0.023803711,0.025985718,-0.015335083,-0.029724121,0.024749756,0.014129639,-0.016983032,-0.0021705627,-0.014312744,0.020721436,-0.023529053,-0.008560181,0.0005173683,-0.0042648315,-0.024734497,-0.026657104,0.009391785,0.0062026978,0.027313232,-0.008178711,-0.047973633,-0.062347412,0.039520264,0.051483154,0.016174316,0.023880005,-0.025680542,-0.030181885,-0.026824951,-0.080078125,0.03805542,0.06549072,-0.011726379,-0.0015134811,0.034851074,-0.011062622,-0.055999756,0.0076141357,-0.010673523,-0.019607544,-0.012954712,0.021759033,-0.04095459,-0.00028514862,0.00522995,0.02243042,0.06359863,-0.018371582,-0.03152466,-0.03744507,0.012794495,0.021713257,-0.023666382,0.013793945,0.0012655258,0.009422302,0.01928711,0.032714844,0.009269714,0.015655518,0.008079529,-0.03353882,0.0060195923,-0.02128601,-0.028945923,0.030883789,0.0019350052,-0.044799805,0.016967773,-0.036590576,0.03466797,-0.04208374,0.02067566,-0.016723633,0.016647339,0.024719238,0.0021362305,-0.032165527,-0.0006389618,0.03479004,0.022018433,0.07849121,0.01576233,0.014144897,-0.006187439,0.050689697,-0.02128601,-0.0043525696,0.031982422,0.023956299,0.04510498,0.0025959015,-0.051483154,-0.054473877,0.010940552,-0.0020656586,0.041778564,-0.015556335,0.05505371,-0.01626587,0.008399963,-0.023025513,-0.020431519,-0.025543213,0.013061523,-0.013130188,-0.016403198,-0.0066070557,-0.034362793,0.0020217896,-0.0049934387,0.0154953,0.01033783,0.053466797,-0.0032920837,-0.041137695,-0.011390686,-0.032073975,-0.024291992,0.00022637844,0.036010742,0.00566864,0.029891968,0.03744507,-0.052764893,0.010482788,0.019958496,-0.009803772,0.015129089,0.018539429,0.0099487305,-0.06604004,-0.03805542,-0.018112183,-0.04815674,0.019042969,-0.027191162,0.020248413,0.059936523,0.0058631897,-0.021011353,-0.033813477,0.030197144,-0.046936035,0.017196655,0.01739502,-0.0057678223,-0.03189087,0.007019043,0.01651001,0.003490448,0.04550171,0.0019989014,0.017425537,0.0637207,0.04244995,0.009391785,0.0011644363,0.014709473,0.030456543,-0.0011749268,-0.013412476,-0.014526367,0.011161804,0.040649414,-0.019119263,-0.032928467,-0.06463623,0.05230713,0.01939392,0.05593872,0.004173279,-0.008720398,0.056488037,0.01802063,-0.0030841827,-0.03439331,-0.022720337,-0.054595947,-0.019515991,0.022964478,-0.018814087,0.004383087,-0.035614014,0.0007972717,-0.0037155151,-0.007545471,-0.030929565,0.037628174,-0.00054979324,0.01524353,0.021774292,0.023635864,0.07342529,0.05178833,-0.03137207,0.00579834,-0.011131287,-0.021514893,0.016723633,0.03302002,0.0052452087,-0.009529114,-0.060302734,-0.022735596,0.01436615,-0.018432617,-0.079711914,-0.0102005005,0.004055023,0.020965576,0.026382446,0.015220642,-0.055389404,-0.0004992485,-0.037231445,-0.039001465,0.015792847,-0.054534912,0.034851074,0.022155762,-0.041137695,0.021957397,-0.017303467,0.0028381348,0.014167786,0.004432678,-0.00019276142,0.021392822,-0.037109375,0.015556335,0.020080566,0.014381409,0.015625,0.03479004,0.024230957,0.0070533752,0.043304443,-0.0062065125,-0.011474609,-0.034301758,0.004070282,-0.017974854,0.023498535,0.010009766,-0.027633667,0.012916565,-0.0055007935,-0.039520264,-0.028427124,0.008285522,-0.0002667904,-0.010795593,0.013191223,-0.030776978,-0.010131836,-0.044281006,-0.0115356445,0.0020885468,0.06072998,0.005466461,-0.03225708,-0.07513428,-0.011833191,0.034454346,0.006126404,0.0082092285,-0.01461792,-0.0073280334,-0.029815674,-0.021133423,-0.019058228,-0.01739502,0.02897644,0.009307861,-0.02128601,0.04336548,0.027404785,0.030838013,0.007663727,0.008903503,0.0126571655,-0.02192688,0.0006432533,-0.028518677,0.032836914,0.00932312,-0.026123047,-0.054748535,0.04019165,-0.012283325,0.055847168,-0.020385742,-0.013412476,0.0015707016,0.014526367,0.021621704,-0.026977539,0.008392334,0.017837524,-0.046142578,-0.0670166,0.0057258606,-0.0038433075,0.025650024,0.0013961792,0.022964478,0.024261475,-0.026870728,0.011917114,0.017425537,-0.018356323,-0.011672974,-0.010292053,-0.036132812,-0.004108429,-0.00033307076,-0.0178833,0.0038375854,0.007446289,0.0027313232,-0.0060043335,-0.029632568,0.031585693,0.002538681,0.012016296,0.035217285,0.0032653809,0.024291992,0.03616333,0.0039634705,-0.03552246,0.032165527,0.021759033,0.006362915,-0.028396606,0.017486572,0.01260376,-0.010055542,0.011169434,-0.0018186569,-0.00541687,-0.011329651,-0.00012373924,0.021102905,0.038726807,0.0074653625,-0.044403076,0.015586853,0.008430481,-0.0135269165,-0.021774292,0.019134521,0.024719238,-0.039733887,0.0079193115,0.033569336,0.040985107,-0.0152282715,0.017425537,-0.0037326813,0.04031372,0.033172607,-0.008033752,-0.008842468,0.02079773,0.006462097,0.010902405,0.005458832,-0.02758789,0.0027561188,0.0015096664,0.024917603,0.021591187,-0.0031356812,-0.008659363,-0.017532349,-0.008895874,0.0027198792,-0.010276794,0.013618469,0.019180298,0.029266357,-0.029464722,0.017959595,0.024429321,-0.020111084,-0.024902344,-0.0047416687,0.011436462,-0.021224976,0.008338928,0.010437012,0.00806427,0.03781128,-0.059265137,0.0087890625,-0.0073165894,0.0021820068,-0.016784668,-0.045013428,-0.027511597,-0.02355957,0.042938232,-0.020019531,0.006916046,0.033477783,0.010429382,-0.0021324158,-0.0032463074,0.013648987,0.004425049,-0.014640808,-0.043060303,-0.021713257,-0.0118255615,0.017288208,-0.027038574,0.024917603,-0.014762878,-0.010803223,0.03161621,-0.025970459,0.0058898926,-0.006843567,-0.002166748,0.016662598,-0.00079107285,0.011810303,0.0066452026,-0.03366089,-0.024353027,0.0070724487,0.02507019,-0.014091492,0.009437561,-0.014343262,0.00043416023,-0.019348145,-0.011207581,0.013328552,0.03567505,0.007083893,0.018859863,-0.03111267,0.0418396,-0.028396606,0.0041046143,-0.01876831,0.0018568039,-0.023773193,-0.03768921,-0.020111084,0.03579712,-0.0047454834,0.0101623535,0.00036907196,-0.045013428,-0.027709961,-0.051696777,0.012290955,0.011054993,0.036834717,-0.046020508,0.0129852295,-0.0009288788,0.0098724365,-0.013938904,-0.0012226105,-0.010070801,0.002960205,0.03781128,0.020217896,-0.018035889,-0.023422241,-0.0435791,-0.013671875,-0.048919678,-0.054595947,-0.013244629,0.04031372,0.008148193,-0.0050086975,-0.018066406,-0.016693115,-0.0040512085,-0.041870117,0.021575928,-0.0070648193,0.010932922,0.0046424866,-0.016204834,-0.00944519,-0.0037956238,0.0027046204,0.013061523,-0.0073661804,-0.0095825195,-0.018692017,-0.011550903,0.020706177,0.002866745,0.0287323,-0.026443481,-0.005027771,-0.024749756,-0.03869629,0.0022945404,-0.021697998,0.01940918,-0.008995056,0.020401001,-0.04977417,-0.009727478,-0.032226562,-0.018157959,0.01448822,0.025100708,0.004169464,-0.009735107,-0.005859375,-0.014274597,-0.030731201,-0.03933716,-0.003162384,0.0104904175,0.0107803345,0.022354126,0.0552063,-0.009849548,0.0048065186,-0.017623901,0.012863159,0.04373169,-0.01158905,0.021087646,0.00365448,-0.003955841,-0.020019531,-0.0010976791,-0.03933716,0.037384033,0.058563232,0.019943237,-0.004600525,-0.01838684,-0.014694214,0.006225586,0.025283813,-0.030563354,0.0115356445,-0.0413208,0.024627686,-0.010375977,0.010887146,0.025177002,0.027877808,-0.02128601,-0.043029785,-0.007209778,0.006790161,-0.019561768,-0.061340332,-0.013687134,-0.0715332,-0.0047836304,-0.012931824,-0.022369385,-0.013290405,0.011833191,-0.010917664,-0.09075928,0.011657715,0.043029785,0.020339966,0.033081055,-0.019821167,0.033050537,0.02507019,-0.022399902,0.0021781921,0.035491943,-0.038726807,-0.02279663,-0.023712158,0.050964355,-0.005622864,-0.03768921,0.0055122375,-0.010658264,0.026901245,-0.011657715,0.008766174,-0.03036499,0.021499634,-0.0002553463,-0.00046610832,-0.0038967133,-0.030151367,0.04559326,-0.074279785,0.016342163,-0.009819031,0.003993988,-0.013557434,0.04626465,0.029083252,-0.038208008,-0.0006842613,0.0033855438,0.006778717,0.041290283,-0.014511108,0.03427124,0.019332886,0.003627777,0.00074100494,-0.0037784576,-0.0051193237,-0.05505371,-0.035980225,0.035583496,0.0082473755,-0.005558014,-0.01965332,-0.0014162064,0.009231567,-0.0021896362,-0.002855301,-0.027877808,-0.0013942719,-0.010871887,0.008666992,0.009529114,0.028396606,0.0014810562,0.031204224,0.03881836,0.03186035,-0.01008606,-0.02456665,0.010643005,0.031143188,0.01146698,-0.01146698,0.027450562,0.0003669262,0.011924744,0.017562866,0.0072631836,-0.013465881,-0.015090942,0.008132935,-0.0033359528,0.010986328,-0.013710022,0.01398468,0.004119873,-0.008575439,-0.0062828064,-0.0075912476,0.037902832,-0.039123535,-0.022628784,-0.012825012,-0.0014867783,0.014785767,0.014694214,-0.006843567,0.030441284,-0.010383606,0.055786133,0.011795044,0.0027503967,0.034362793,0.041900635,0.014678955,-0.019134521,0.016418457,-0.0030021667,-0.00022363663,0.012039185,-0.022628784,0.02619934,0.04727173,-0.016983032,0.03439331,-0.010856628,0.017318726,-0.004837036,0.015281677,-0.009185791,-0.00894165,-0.023712158,0.05090332,-0.024642944,0.021774292,0.02507019,-0.0031814575,-0.007522583,-0.022735596,-0.044403076,0.03466797,0.022979736,0.00005620718,0.03137207,-0.007156372,0.025527954,-0.032226562,-0.012718201,-0.022277832,-0.03390503,-0.030197144,0.0011644363,-0.002456665,0.012367249,0.01928711,-0.008857727,-0.0060539246,-0.02468872,0.031799316,-0.000436306,0.01927185,-0.026535034,-0.020629883,-0.016448975,-0.02029419,-0.017837524,0.0043678284,0.0020637512,0.030258179,0.032073975,0.0009899139,0.025390625,-0.007843018,-0.020492554,-0.013153076,-0.03277588,0.0058403015,-0.023956299,-0.007575989,-0.022415161,0.036712646,0.051727295,0.025650024,0.04360962,0.034179688,0.033203125,-0.0071258545,0.040863037,-0.023025513,-0.0074310303,-0.02949524,0.02243042,0.002981186,0.024261475,-0.022506714,-0.007610321,0.026397705,0.030670166,-0.007972717,0.021942139,0.06689453,0.014785767,-0.025558472,0.049926758,-0.00730896,-0.01537323,-0.031677246,-0.016220093,0.064086914,0.012107849,0.04437256,0.019577026,0.000538826,-0.015586853,0.014656067,-0.026138306,-0.011222839,0.054229736,0.0025138855,-0.010765076,-0.03466797,-0.003414154,0.005279541,-0.02986145,0.0024471283,0.017944336,-0.017120361,0.003967285,-0.0090408325,-0.005142212,-0.004207611,0.005306244,0.008483887,0.018539429,-0.025283813,0.0053977966,0.020477295,0.023788452,0.029907227,0.015838623,0.044189453,-0.030670166,-0.021850586,-0.013000488,0.031402588,0.00024235249,0.0020523071,0.040008545,0.01586914,0.04373169,0.041290283,-0.010063171,-0.010063171,0.028137207,-0.008300781,0.0036373138,0.039520264,0.03274536,0.0107421875,0.033721924,0.02406311,0.030654907,-0.045288086,0.014442444,-0.0011873245,0.028793335,-0.016967773,-0.027038574,0.0058937073,0.010559082,0.02897644,-0.014167786,-0.006134033,0.008232117,0.05014038,-0.0054626465,-0.008399963,-0.002954483,0.0031051636,0.0036678314,-0.006565094,0.014419556,-0.036834717,0.011299133,0.018081665,0.020751953,-0.029312134,0.033203125,-0.02355957,-0.028335571,0.0018119812,0.01675415,-0.031204224,0.022857666,-0.012237549,0.004650116,-0.035858154,0.006378174,0.011428833,-0.001077652,-0.0019102097,0.012809753,0.010917664,0.009254456,0.04046631,0.025512695,-0.0043411255,0.0102005005,-0.009056091,0.0015134811,0.05340576,-0.008293152,0.009361267,-0.016601562,0.016693115,0.01612854,-0.02909851,-0.02154541,0.023544312,-0.010925293,-0.017547607,0.002773285,0.050323486,-0.0008535385,0.04309082,-0.020492554,-0.008659363,0.017227173,0.022125244,0.017242432,-0.03201294,0.010574341,0.024139404,-0.024917603,0.045318604,0.041503906,0.0060691833,0.01121521,0.011276245,-0.007972717,-0.0047416687,-0.025939941,0.0068893433,-0.036315918,0.0034999847,0.0059165955,0.022949219,-0.028503418,-0.029678345,0.021820068,-0.020751953,-0.03427124,-0.024093628,0.017654419,-0.0042419434,0.011421204,0.04095459,0.031982422,-0.02784729,0.06707764,0.0011548996,0.059936523,0.0017023087,0.015075684,0.028442383,0.03289795,0.02986145,0.0068359375,0.02658081,-0.008033752,0.001168251,0.026473999,0.013175964,0.013336182,-0.0024204254,-0.01687622,0.042236328,-0.0024604797,0.038879395,-0.01991272,-0.011672974,0.0004210472,0.0036830902,-0.0066833496,0.0008597374,-0.010192871,0.018341064,0.050445557,-0.047546387,-0.019332886,-0.03161621,0.00087976456,0.03326416,-0.014381409,0.021560669,0.007785797,-0.017700195,0.0034732819,-0.0065574646,-0.020339966,0.017730713,0.02861023,-0.033081055,-0.01687622,0.0096588135,0.022918701,-0.0044059753,0.04248047,0.021255493,-0.007865906,0.008338928,0.050354004,-0.0024356842,0.04159546,-0.009086609,0.038116455,0.040039062,-0.012687683,-0.01474762,0.0026359558,0.016555786,-0.012916565,0.0077552795,0.03845215,0.018356323,-0.01374054,-0.003768921,-0.008628845,-0.00007998943,0.014953613,-0.016784668,-0.0043563843,0.0009908676,-0.008155823,0.020385742,0.013977051,0.005340576,-0.0032100677,-0.008476257,-0.012939453,0.012023926,0.033294678,0.042144775,-0.039733887,0.009666443,0.009017944,-0.015853882,-0.026123047,-0.01789856,0.017059326,-0.03704834,0.031219482,0.013153076,0.024795532,-0.0026283264,-0.033416748,0.019561768,0.05090332,0.017990112,0.034362793,0.0050964355,-0.0115737915,0.011947632,0.001036644,0.0033302307,-0.0025024414,0.0041618347,-0.021102905,0.020874023,-0.014953613,-0.013595581,0.026611328,0.0039787292,0.014419556,0.00655365,0.014144897,0.04711914,-0.008460999,-0.010147095,-0.009017944,-0.008216858,-0.010253906,0.0027256012,-0.012298584,0.016448975,0.034423828,-0.00932312,-0.0023841858,0.026260376,0.019638062,0.028366089,0.02784729,0.023117065,0.052856445,0.021224976,-0.010055542,-0.0036811829,0.014984131,-0.019104004,-0.03604126,0.017181396,-0.031982422,-0.031036377,0.021881104,0.014579773,-0.009376526,-0.024337769,-0.025970459,-0.00995636,-0.0082092285,-0.0034122467,-0.00024414062,0.0070343018,-0.03262329,-0.012702942,-0.01322937,-0.009895325,-0.023330688,-0.018341064,-0.012870789,-0.022354126,-0.041534424,-0.0015802383,-0.008903503,0.0025157928,-0.01576233,0.0103302,-0.011291504,0.020233154,-0.017059326,-0.014915466,0.004055023,0.034606934,-0.007774353,-0.0006546974,0.008972168,-0.015777588,-0.01789856,-0.007621765,-0.009986877,-0.029571533,0.046966553,-0.012062073,0.045410156,-0.009902954,-0.025054932,0.0073013306,-0.022567749,-0.020446777,0.01663208,-0.019607544,-0.032287598,0.031021118,0.017608643,0.0054969788,0.0115356445,0.051696777,-0.007080078,-0.015075684,0.011962891,0.034454346,0.016525269,0.029907227,-0.0010738373,0.0022335052,-0.03201294,0.003768921,-0.019195557,-0.005115509,-0.01637268,0.0014886856,-0.005191803,0.021881104,0.015899658,-0.009681702,-0.010147095,0.03302002,0.01991272,-0.013633728,0.0435791,0.01625061,0.0053749084,-0.020263672,-0.00035715103,0.006412506,0.03604126,0.018005371,0.03048706,-0.029418945,0.015205383,-0.021102905,0.008323669,0.00605011,-0.010070801,-0.021072388,-0.0053901672,-0.01914978,0.0039901733,-0.020019531,0.017105103,-0.006351471,0.025939941,-0.0019159317,-0.027404785,-0.008079529,0.014823914,0.008239746,-0.0060539246,-0.0020256042,0.00050735474,0.02204895,-0.01285553,0.029464722,-0.052856445,-0.04244995,-0.015098572,-0.01838684,0.034088135,-0.006587982,-0.025665283,0.010848999,0.0035419464,0.0059051514,-0.0034046173,0.027420044,-0.010681152,-0.0064430237,0.014656067,0.030014038,-0.014709473,0.015930176,-0.0037231445,-0.017700195,0.031555176,-0.00061130524,0.02029419,0.023071289,0.04711914,0.007637024,0.013412476,0.023605347,-0.00032567978,0.009986877,-0.0141067505,-0.016540527,-0.0029144287,-0.0011482239,0.007118225,-0.015960693,-0.025421143,-0.0013313293,-0.015098572,-0.019058228,0.010551453,-0.000018417835,0.040008545,-0.0068092346,0.040100098,-0.03277588,-0.015258789,-0.013618469,0.005142212,-0.01449585,0.015625,0.023880005,-0.001584053,-0.0017271042,-0.005821228,-0.0055503845,-0.0107040405,0.006465912,-0.0025787354,-0.005455017,0.0071640015,-0.008483887,0.010360718,0.029815674,0.009727478,-0.016189575,0.020843506,0.01121521,0.028396606,0.00084781647,0.020843506,-0.0031700134,-0.0154418945,0.0024089813,0.007911682,-0.0068969727,0.014984131,-0.006980896,0.0030288696,-0.036102295,0.011398315,-0.015090942,0.050445557,-0.022979736,0.02168274,-0.021377563,0.022628784,-0.019180298,0.016738892,-0.048553467,0.002155304,0.028808594,-0.009994507,0.0070991516,0.012924194,-0.021575928,0.030044556,0.04058838,0.0024738312,-0.032165527,-0.013397217,-0.0008702278,0.017715454,0.0005464554,-0.009315491,-0.03729248,-0.029968262,-0.00012266636,0.006790161,-0.011230469,-0.008850098,0.01576233,0.023452759,0.007911682,-0.000582695,0.032958984,-0.01977539,-0.003709793,-0.00730896,0.017807007,0.020812988,0.029541016,-0.028518677,0.044769287,-0.0017251968,-0.012084961,0.06097412,-0.028366089,0.008003235,-0.02708435,0.0005249977,-0.024734497,-0.02734375,-0.0061073303,-0.008262634],"createdAt":"2026-04-18T18:56:00.704Z","updatedAt":"2026-04-25T08:33:11.768Z","lastSeenAt":"2026-04-25T08:33:11.768Z","tsv":"'/api/v1/stripe/invoices/39':85 '0.02':10,24,72,123 '000':112 '0913':118 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':134 '0x8335':117 '20':111 '300':137 '6':127 'Base network API' 'USDC micropayment API' 'accept':102 'access':36,148 'actual':223 'address':133 'advertis':147 'ai/ml':62 'analyt':61 'api':35,58,141,163 'appear':86 'base':8,22,80,113,120 'behavior':224 'behind':37 'beyond':203 'bodi':206 'broader':47 'call':74 'challeng':97 'confirm':98 'connect':172 'content':178 'crypto-gated endpoint' 'data':60,65 'decim':128 'descript':190 'detail':189 'discov':233 'doc':162 'document':157,221 'empir':234 'endpoint':6,20,30,84,196,214,220,230 'equal':122 'exact':108 'exampl':186 'expect':202 'extrem':159 'finance/web3':64 'format':227 'gate':3,17 'grant':150 'header':156 'infer':63 'infrastructur':67 'input':200 'invoic':5,19,92,195 'invoice-rel':91 'key':142 'land':210 'limit':145 'list':212 'live':101 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':213 'must':231 'network':81 'no-api-key' 'offer':50 'openapi':182 'page':167,211 'part':44 'pay':9,23,55 'pay-per-call API' 'pay-per-request':54 'payment':40,109,129,155 'per':13,27,56,73,219 'per-endpoint':218 'platform':48,208 'post':103,205 'post-endpoint' 'premium':34 'price':70,164 'prompt':174 'provid':33,216 'pure':151 'rate':144 'readm':166 'relat':93 'render':169 'request':14,28,57,104 'request/response':185 'requir':106 'resourc':94 'respons':226 'return':197 'schema':183 'second':138 'sent':131 'settl':75 'span':59 'spars':160 'specif':83,194 'stripe':4,18,90 'stripe invoice API' 'stripe-invoices' 'substant':177 'timeout':139 'unit':114 'usd':124 'usdc':12,26,77,116,125 'usdc-base' 'use':126 'util':68 'varieti':52 'via':152 'wall':41 'wallet':173 'x402':2,16,39,96,154 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"99f055d6-fbc9-4719-a3af-451921d8c04c","listingId":"ca2adfa9-107b-46a5-a7d3-30afd43100a2","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/stripe/invoices/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:00.704Z"}],"sources":[{"listingId":"ca2adfa9-107b-46a5-a7d3-30afd43100a2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/39","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:00.704Z","lastSeenAt":"2026-04-25T08:33:11.768Z"}],"details":{"listingId":"ca2adfa9-107b-46a5-a7d3-30afd43100a2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/39 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/39"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/39"}],"useCases":["Programmatically accessing Stripe invoice data via a crypto-payment-gated endpoint","Integrating pay-per-request invoice retrieval into an agent workflow without API key management","Demonstrating x402 protocol usage for micropayment-gated API access"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need keyless, pay-per-call API access settled in USDC","Projects requiring Stripe invoice data without traditional subscription billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume invoice processing where $0.02 per call adds up significantly","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.888Z"},"updatedAt":"2026-04-25T08:33:11.768Z"}}