---
title: "Resolve a symbol or ISIN as of a date"
method: GET
path: "/v1/reference/resolve"
tags: ["reference"]
---

# Resolve a symbol or ISIN as of a date

`GET /v1/reference/resolve`

## Request

- Base URL: `https://api.tapetide.com`
- URL: `https://api.tapetide.com/v1/reference/resolve`
- Auth: HTTP bearer

Resolve a historical NSE symbol or ISIN to the company that held it on a date, for old holdings files or backtests where a ticker may since have been renamed or reused. `status` is `present`, `uncertain` (the date is in an unobserved bracket around a rename or ISIN change: quarantine it rather than assert the mapping), `not_found` (no company held the value on that date, within coverage) or `out_of_coverage` (outside `meta.coverage`: never report it as 'no such symbol'). Coverage usually ends a session or two before today, so a call without `date` can answer `out_of_coverage`. Every company that matches is listed in `matches` with its state, observed range and its latest known `symbol` and `isin` for the per-stock routes; a recycled ticker therefore shows both holders.

## Query parameters

- `value` string, required
- `kind` 'nse_symbol' | 'isin'
- `date` string, date

## Response `200`

OK. Costs one request unit.

- Envelope
  - `data` unknown, required
  - `meta` object, required: Paging and window information where the route pages (e.g. `window.next_cursor` on price history).
    - `as_of` string, date-time: When this response was assembled (UTC).
    - `route` string: The operationId that served it.

## Other responses

- `400`: Malformed or out-of-range parameter. Not charged.
- `401`: Missing or invalid bearer token.
- `404`: The symbol, index or document does not exist. Not charged.
- `429`: Per-minute burst cap (`rate_limited`) or plan quota (`quota_exhausted`) reached.
- `502`: A data dependency was unavailable. Not charged.
- `503`: Authentication or quota service temporarily unavailable (`service_unavailable`). Not charged; retry after `Retry-After` seconds.

---

[API](https://skmtc.dev/tapetide/apis/tapetide-api.md) · [All operations](https://skmtc.dev/tapetide/apis/tapetide-api/llms.txt) · [OpenAPI document](https://skmtc.dev/tapetide/apis/tapetide-api/revisions/261ec086bde5?raw)