{"openapi":"3.1.0","info":{"title":"Braille","version":"0.1.0","description":"Unicode braille utilities — transcribe text to grade-1 (uncontracted) English braille and back, and convert between braille cells and their raised-dot numbers.","x-guidance":"Unicode braille utilities — transcribe text to grade-1 (uncontracted) English braille and back, and convert between braille cells and their raised-dot numbers. Each operation is an HTTP POST to its /v1/<operation> path with a JSON request body (see each operation's requestBody schema) and returns a JSON response. 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://braille.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/encode":{"post":{"summary":"Text to braille","description":"Transcribe text to Unicode braille (grade-1 / uncontracted English braille), with capital and number signs. Characters with no grade-1 representation are clean 400s. Paid endpoint (x402 + MPP). Price: $0.002000 USDC per successful payment.","tags":["text to braille","braille encoder","transcribe braille text","unicode braille conversion","grade one braille"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"text":{"type":"string","description":"Text to transcribe (letters, digits, spaces and common punctuation)."}},"required":["text"],"additionalProperties":false}}}},"responses":{"200":{"description":"`{ braille, cellCount }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ braille, cellCount }`."}}}},"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":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Transcribe text to Unicode braille (grade-1 / uncontracted English braille), with capital and number signs. 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Price: $0.002000 USDC per successful payment.","tags":["braille to text","braille decoder","parse braille cells","unicode braille translation","decode braille string"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"braille":{"type":"string","description":"Unicode braille string (U+2800–U+28FF cells)."}},"required":["braille"],"additionalProperties":false},"example":{"braille":"⠠⠓⠑⠇⠇⠕"}}}},"responses":{"200":{"description":"`{ text }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ text }`."}}}},"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":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Transcribe a Unicode braille string back to text, honouring capital and number signs. 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Price: $0.002000 USDC per successful payment.","tags":["braille dot numbers","braille cell dots","parse braille dots","braille dots lookup","raised dot numbers"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"braille":{"type":"string","minLength":1,"description":"Unicode braille string to decompose."}},"required":["braille"],"additionalProperties":false},"example":{"braille":"⠓⠊"}}}},"responses":{"200":{"description":"`{ cells: [{ char, dots }] }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ cells: [{ char, dots }] }`."}}}},"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":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.","method":"tempo","preferredOffer":"mpp-tempo","price":{"mode":"fixed","currency":"USD","amount":"0.002000"},"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":"2000","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.","intent":"charge","method":"evm","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"},{"amount":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.","intent":"charge","method":"tempo","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}]}}},"/v1/from-dots":{"post":{"summary":"Dot numbers to braille cells","description":"Build braille cells from raised-dot numbers (each cell an array of 1–8). 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Price: $0.002000 USDC per successful payment.","tags":["dots to braille","braille cell builder","convert dot numbers","braille from dots","raised dots to unicode"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"cells":{"type":"array","minItems":1,"description":"Array of cells; each cell is an array of dot numbers (1–8), e.g. [[1,2,5],[1,5]].","items":{"type":"array","items":{"type":"integer","minimum":1,"maximum":8}}}},"required":["cells"],"additionalProperties":false}}}},"responses":{"200":{"description":"`{ braille, cells: [{ dots, char }] }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ braille, cells: [{ dots, char }] }`."}}}},"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":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Build braille cells from raised-dot numbers (each cell an array of 1–8). 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