# extension_not_supported

HTTP 400 · Plan counts (SPEC §3.1, §3.2)

That Postgres extension isn't one Flatstack supports. Use pgvector, postgis, pg_trgm, unaccent, citext, uuid-ossp or pgcrypto.

## Does retrying help?

Not as it is. Change the request as the message says, then send it again.

## The response

Every Flatstack error has this shape. `details`, when present, says more about this case.

```json
{
  "error": {
    "code": "extension_not_supported",
    "message": "That Postgres extension isn't one Flatstack supports. Use pgvector, postgis, pg_trgm, unaccent, citext, uuid-ossp or pgcrypto.",
    "docsUrl": "https://flatstack.dev/docs/errors/extension_not_supported"
  }
}
```

[All error codes](/docs/errors)