Reference

ISIN Change List

GET/v2/securities/isin-changed

Returns a paginated list of securities whose ISIN changed, with the old and new ISIN. The old row was deprecated (deprecation_reason 'isin_changed') and superseded by a new active row for the same instrument. Optionally filter by security type.

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Authentication

Send your API key in the x-api-key header on every request to https://api.bavest.co. The samples read it from the BAVEST_API_KEY environment variable. Get an API key · Authentication guide

Parameters

Name	In	Type	Required	Description
limit	query	integer (int32)	no	Maximum number of results to return (default 100, max 1000) Default `100`
offset	query	integer (int32)	no	Number of results to skip for pagination (default 0) Default `0`
type	query	string	no	Filter by security type (e.g. EQUITY, ETF, ADR) Example when explicitly filtering: `EQUITY`.

Try it

GET /v2/securities/isin-changed

API key

Sent only to api.bavest.co for this request; not stored.

Sign in to send Get an API keySends with the key above, or sign in to use your account's key. Each request counts as one API call.

curl 'https://api.bavest.co/v2/securities/isin-changed' \
  -H "x-api-key: $BAVEST_API_KEY"

Samples read your key from BAVEST_API_KEY and follow the form.

Example response 200

{
  "data": [
    {
      "oldIsin": "CA08662X4066",
      "newIsin": "CA08662X6046",
      "symbol": "SLVD.TO",
      "name": "BetaPro Silver -2x Daily Bear ETF",
      "type": "ETF",
      "exchange": "TSX",
      "changedAt": "2026-10-02T07:04:22.931218+00:00",
      "deprecationReason": "symbol_changed"
    },
    {
      "oldIsin": "TH0922B10Z07",
      "newIsin": "TH0922D10Z05",
      "symbol": "PSGC.BK",
      "name": "PSG Corporation Public Company Limited",
      "type": "EQUITY",
      "exchange": "SET",
      "changedAt": "2026-10-02T07:04:22.931218+00:00",
      "deprecationReason": "symbol_changed"
    }
  ],
  "meta": {
    "page": 1,
    "pageSize": 100,
    "totalPages": 32,
    "totalCount": 3127,
    "parameters": {
      "limit": "100"
    },
    "time": 6035
  }
}

From the docs, not your data. Long lists are cut to 3 items.

Response 200

Successful response · application/json

dataarray of IsinChangeListItem
- oldIsinstring | null
  Previous (deprecated) ISIN
  Example US0079031078
- newIsinstring | null
  Current (successor) ISIN
  Example US0079031115
- symbolstring | null
  Ticker symbol (the successor's, unchanged across an ISIN change)
  Example AMD
- namestringrequired
  Security name
  Example Advanced Micro Devices, Inc.
- typestring
  Security type
  Example EQUITY
- exchangestring | null
  Exchange the security trades on
  Example NASDAQ
- changedAtstring (date-time) | null
  When the old row was deprecated / the ISIN change recorded (ISO-8601, tz-aware)
  Example 2026-05-21T12:16:43.824829+00:00
- deprecationReasonstring | null
  Reason the old row left active status
  Example isin_changed
metaResponseMeta
Response metadata for paginated endpoints. Offset pagination returns page/pageSize/totalPages/totalCount; cursor pagination returns pageSize/hasMore/nextCursor and totalCount only when known.
- timeinteger
  Server-side processing time in milliseconds
  Example 17
- parametersobject
  Echo of the request parameters the endpoint resolved
- pageinteger
  Current page number (offset pagination)
  Example 1
- pageSizeinteger
  Number of results per page
  Example 50
- totalPagesinteger
  Total number of pages (offset pagination)
  Example 2
- totalCountinteger
  Total number of results across all pages
  Example 100
- hasMoreboolean
  Whether more results follow (cursor pagination)
- nextCursorstring | null
  Cursor for the next page (cursor pagination), null on the last page

Errors

400Invalid request parameters. Returned when required query parameters are missing, have invalid types, or violate constraints (e.g., providing both symbol and isin when they are mutually exclusive).
401Missing or invalid API key.
429Rate limit exceeded. Retry after the `Retry-After` header interval.
500An unexpected error occurred on the server. If the issue persists, contact support with the X-Request-Id header value.
502Upstream data provider returned an error or is temporarily unavailable. Retry after a short delay.
504The request timed out waiting for a response from the upstream data provider. This may occur for complex queries or during peak load.
defaultAn unexpected error occurred on the server. If the issue persists, contact support with the X-Request-Id header value.