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Endpoints are paid per successful call via x402 or MPP (USDC on Base); an unpaid request returns 402 with payment metadata in the WWW-Authenticate header.","contact":{"email":"hello@openverbs.com"}},"x-discovery":{"ownershipProofs":["0xb1401a71756f51464a9962db12f1eb3e9522490cd20010b06d00cf7b7770acfd5f79721f9dfdf2643f8cecd29af3bde9ec133941a386042b32d9886053a70de61b","0xc1c1f11793e18a00fcb7072421f26e89fb75b6aa517fa84370564991f4b10efa024f6f57e4e67eefd20cf46cc01fc5a62d793fa8fbcda04f26c946a3433d73f91b","0x676b474af0ef9ed4809b5d12d2e789b36e52d56215b21f601d71f76620e36ec630347116a7b2b349a3c3681e5db0fbfa76c4169a676b6d6f27864d0e5017284a1c","0xc2ab96522515ed9e9bc4f1a241b774bd48df42e951ddbf7f6aa8fc76f5a96a20421703e1ec402ce7eb1e4eabea3b6e4e4129cf39d56ea91cf4fcf38561fc94fc1c"]},"servers":[{"url":"https://fx.openverbs.com"}],"paths":{"/health":{"get":{"summary":"Health check","security":[],"responses":{"200":{"description":"Healthy","content":{"application/json":{"schema":{"type":"object","properties":{"ok":{"type":"boolean"},"service":{"type":"string"},"version":{"type":"string"}}}}}}}}},"/v1/convert":{"post":{"summary":"Convert currency","description":"Convert an amount from one currency to another using reference rates (latest or a historical date). Amount defaults to 1. Paid endpoint (x402 + MPP). Price: $0.006000 USDC per successful payment.","tags":["convert currency","currency conversion api","exchange amount conversion","forex rate conversion","historical currency conversion","convert money rates"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"from":{"type":"string","enum":["AUD","BRL","CAD","CHF","CNY","CZK","DKK","EUR","GBP","HKD","HUF","IDR","ILS","INR","ISK","JPY","KRW","MXN","MYR","NOK","NZD","PHP","PLN","RON","SEK","SGD","THB","TRY","USD","ZAR"],"description":"Source currency (ISO 4217)."},"to":{"type":"string","enum":["AUD","BRL","CAD","CHF","CNY","CZK","DKK","EUR","GBP","HKD","HUF","IDR","ILS","INR","ISK","JPY","KRW","MXN","MYR","NOK","NZD","PHP","PLN","RON","SEK","SGD","THB","TRY","USD","ZAR"],"description":"Target currency (ISO 4217)."},"amount":{"type":"number","exclusiveMinimum":0,"description":"Amount in the source currency. Defaults to 1."},"date":{"type":"string","pattern":"^\\d{4}-\\d{2}-\\d{2}$","description":"Historical date (YYYY-MM-DD). Defaults to latest."}},"required":["from","to"],"additionalProperties":false}}}},"responses":{"200":{"description":"The `rate` and converted `result` for `amount` `from`→`to`, plus the `date` the rate is from. Same-currency conversions return rate 1.","content":{"application/json":{"schema":{"type":"object","description":"The `rate` and converted `result` for `amount` `from`→`to`, plus the `date` the rate is from. Same-currency conversions return rate 1."}}}},"400":{"description":"Invalid request; no payment is attempted"},"402":{"description":"Payment required; x402/MPP metadata returned in headers"},"502":{"description":"Upstream provider error after payment verification"}},"x-payment-info":{"amount":"6000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Convert an amount from one currency to another using reference rates (latest or a historical date). 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Defaults to latest."}},"required":["base"],"additionalProperties":false}}}},"responses":{"200":{"description":"The `base`, the `date`, and a `rates` map of currency → rate.","content":{"application/json":{"schema":{"type":"object","description":"The `base`, the `date`, and a `rates` map of currency → rate."}}}},"400":{"description":"Invalid request; no payment is attempted"},"402":{"description":"Payment required; x402/MPP metadata returned in headers"},"502":{"description":"Upstream provider error after payment verification"}},"x-payment-info":{"amount":"6000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Reference exchange rates for a base currency against some or all supported currencies (latest or a historical date).","method":"tempo","preferredOffer":"mpp-tempo","price":{"mode":"fixed","currency":"USD","amount":"0.006000"},"protocols":[{"x402":{"scheme":"exact","network":"eip155:8453","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}},{"mpp":{"method":"evm","intent":"charge","network":"8453","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}},{"mpp":{"method":"tempo","intent":"charge","network":"4217","currency":"0x20c000000000000000000000b9537d11c60e8b50","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}}],"network":"4217","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","offers":[{"amount":"6000","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"Reference exchange rates for a base currency against some or all supported currencies (latest or a historical date).","intent":"charge","method":"evm","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"},{"amount":"6000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Reference exchange rates for a base currency against some or all supported currencies (latest or a historical date).","intent":"charge","method":"tempo","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}]}}}},"x-service-info":{"categories":["finance"],"docs":{"homepage":"https://fx.openverbs.com","apiReference":"https://fx.openverbs.com/openapi.json"}}}