{"id":"f598215b-03de-4269-b5f8-eb11de8e211d","shortId":"xXgGd7","kind":"x402","title":"IOTA DeFi liquidity data via x402 micropayment on Base, $0.02 per request.","tagline":"IOTA DeFi liquidity data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides IOTA DeFi liquidity data through the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider (lowpaymentfee.com) hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and utility services, all priced uniformly at $0.02 per request. This specific endpoint sits in the Finance & Web3 category and focuses on IOTA liquidity information, though the exact response schema and fields are not documented in the available crawl material.\n\nBecause no OpenAPI spec, detailed documentation, or example responses were found, the precise structure of the returned liquidity data is unknown. The docs, pricing, and API pages all resolve to a minimal \"Connect wallet\" prompt with no further technical detail. Callers should expect a JSON response but will need to experiment to determine the exact fields returned.","tags":[],"capabilities":["defi-liquidity-data","iota","x402-payment","usdc-base","pay-per-request","json-api","no-api-key"],"categories":["defi","finance"],"synonyms":["IOTA liquidity","DeFi liquidity API","IOTA DeFi","liquidity pool data","x402 DeFi endpoint","crypto liquidity","IOTA market data"],"warnings":["No OpenAPI or schema documentation available — response structure is unknown","Docs, pricing, and API pages all render only a 'Connect wallet' prompt with no technical content","The specific fields and format of IOTA liquidity data cannot be verified from available material","Provider hosts many endpoints with identical generic descriptions; unclear how mature each one is"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity","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/defi/IOTA/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty stubs. The exact data returned is unknown, making this effectively a stub 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'000':65 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':56 '20':64 '6':69 'DeFi liquidity API' 'IOTA DeFi' 'IOTA liquidity' 'IOTA market data' 'accept':40 'ai/ml':109 'analyt':108 'api':72,105,177 'attach':81 'avail':149 'base':9,21,51,66 'broad':98 'call':104 'caller':79,192 'catalog':99 'categori':130 'connect':184 'contract':55 'cost':59 'crawl':150 'crypto liquidity' 'data':4,16,33,107,170 'decim':70 'defi':2,14,31 'defi-liquidity-data' 'detail':156,191 'determin':204 'doc':174 'document':146,157 'endpoint':26,124 'exact':139,206 'exampl':159 'expect':194 'experi':202 'field':143,207 'financ':128 'finance/web3':111 'focus':132 'found':162 'header':86 'host':96 'infer':110 'inform':136 'iota':1,13,30,134 'json':45,196 'json-api' 'key':73 'limit':76 'liquid':3,15,32,135,169 'liquidity pool data' 'lowpaymentfee.com':28,95 'materi':151 'micropay':7,19 'minim':183 'need':200 'network':52 'no-api-key' 'openapi':154 'page':178 'pay':102 'pay-per-cal':101 'pay-per-request' 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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/defi/IOTA/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:25.285Z"}],"sources":[{"listingId":"f598215b-03de-4269-b5f8-eb11de8e211d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:25.285Z","lastSeenAt":"2026-04-22T21:30:27.042Z"}],"details":{"listingId":"f598215b-03de-4269-b5f8-eb11de8e211d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity"},{"claim":"Payment is 20,000 base units of USDC (6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/IOTA/liquidity"},{"claim":"Provider advertises $0.02/request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying current IOTA DeFi liquidity pool metrics programmatically","Building dashboards that display IOTA liquidity across protocols","Automated trading agents that need real-time IOTA liquidity depth before executing swaps","Research and analytics on IOTA DeFi ecosystem liquidity trends"],"bestFor":["Agents or bots that need on-demand IOTA DeFi liquidity snapshots without managing API keys","Developers building IOTA DeFi integrations who prefer pay-per-call pricing","Low-volume consumers who want instant access without subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed API documentation or guaranteed response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.732Z"},"updatedAt":"2026-04-22T21:30:27.042Z"}}