SEDOL

GET/v0/sedol

Validates a SEDOL (Stock Exchange Daily Official List) code — the 7-character alphanumeric identifier assigned by the London Stock Exchange Group (LSEG) to securities listed on UK and Irish exchanges, as well as many internationally traded instruments. A SEDOL consists of 6 alphanumeric characters followed by a 1-digit check digit computed using a weighted modulo-10 algorithm with position weights [1, 3, 1, 7, 3, 9]. Modern SEDOLs (issued after 2004) do not use vowels in the first 6 characters, though older codes may contain them. Whitespace in the input is stripped automatically.

When the SEDOL is structurally valid, the endpoint queries OpenFIGI (Bloomberg) using idType: ID_SEDOL to retrieve instrument details. Results are cached for 24 hours. Unlike /v0/isin and /v0/cusip, the ESMA FIRDS database is not queried for SEDOL codes — the FIRDS dataset (ISO 20022 / MiFID II) uses ISIN as its primary identifier and does not include SEDOL.

Guides: Node.js · Python

Try it

Query Parameters

Parameter	Type	Required	Description
value	string	Yes	The 7-character SEDOL to validate (e.g. `0798059`)

Example Request

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.isvalid.dev/v0/sedol?value=0798059"

Response Fields

Field	Type	Description
valid	boolean	Whether the SEDOL passed format and check digit validation
sedol	string	The normalised (uppercased) SEDOL code
checkDigit	string	The check digit (7th character, always a digit 0–9)
found	boolean \| null	Whether the instrument was found in OpenFIGI. `true` — found, instrument details included; `false` — structurally valid SEDOL but not found in OpenFIGI; `null` — OpenFIGI unavailable, structural validation result only
dataSource	string	Always `openfigi` when present. Present only when `found` is `true`
name	string \| null	Full instrument name (e.g. `BP PLC`). Present when `found` is `true`
ticker	string \| null	Exchange ticker symbol (e.g. `BP/`). From OpenFIGI; `null` if not provided
exchCode	string \| null	Bloomberg exchange code (e.g. `LN` for London Stock Exchange). From OpenFIGI; `null` if not provided
securityType	string \| null	Security type from OpenFIGI (e.g. `Common Stock`). From OpenFIGI; `null` if not provided
marketSector	string \| null	Market sector from OpenFIGI (e.g. `Equity`). From OpenFIGI; `null` if not provided
figi	string \| null	Financial Instrument Global Identifier (e.g. `BBG000BT4FC2`). From OpenFIGI; `null` if not provided
compositeFIGI	string \| null	Composite FIGI representing the instrument across all exchanges. From OpenFIGI; `null` if not provided or unavailable

Example Response — found

{
  "valid": true,
  "sedol": "0798059",
  "checkDigit": "9",
  "found": true,
  "dataSource": "openfigi",
  "name": "BP PLC",
  "ticker": "BP/",
  "exchCode": "LN",
  "securityType": "Common Stock",
  "marketSector": "Equity",
  "figi": "BBG000BT4FC2",
  "compositeFIGI": "BBG000BT4FC2"
}

Example Response — not found

{
  "valid": true,
  "sedol": "0798059",
  "checkDigit": "9",
  "found": false
}

Example Response — invalid

{
  "valid": false
}