# Verify an agent token for one tool call

`POST /api/v1/agent-tokens/verify` · operationId `verifyAgentToken`

For developers: your server sends this request with a server key; it is not a button in the dashboard.

A refusal is 200 {valid:false, reason} in fixed words, never an error; nothing is recorded for it. reason is unknown (no such token), expired, revoked, out_of_scope (the tool is not in the token), approval_changed (the tool was changed or disabled after the token was issued) or disabled (agent tokens are off for this Site).

## Authentication

Send `Authorization: Bearer YOUR_SERVER_KEY` (siteServerKey: Site server key in Authorization: Bearer <key> (the scheme is case-insensitive and required; a bare key is 401). Shown once on creation or rotation. Publishable keys cannot authenticate). Keep the server key in server-only configuration; never send it to a browser.

## Request body

Content-Type: application/json (required)

- `token` (string, required)
- `tool` (string, required) · pattern `^[A-Za-z0-9_-]{1,64}$`
- `eventId` (string, optional) · pattern `^[A-Za-z0-9_-]{8,128}$`: Optional: a retry with the same eventId is the same call (replayed true), never a second metered call.

```json
{
  "token": "tt_agent_PASTE_AGENT_TOKEN",
  "tool": "search_docs",
  "eventId": "call_00000001"
}
```

## Responses

- **200**: Success · body `object (one of 2 shapes)`
- **400**: bad_request: the request is invalid; message says what to fix and field names the request field · body `Error`
- **401**: unauthorized (missing or invalid server key, missing Bearer scheme) · body `Error`
- **403**: forbidden: the call came from a browser page or another Site; call from your server with this Site’s server key · body `Error`
- **404**: not_found: unknown path, or an ID in the path that is not on this Site · body `Error`
- **409**: conflict: eventId was already used for another token or tool · body `Error`
- **413**: payload_too_large: the request body exceeds 131072 bytes · body `Error`
- **429**: rate_limited: wait for Retry-After · body `Error` · headers `Retry-After`
- **500**: internal_error: fail the protected action; do not retry automatically · body `Error`
- **503**: service_unavailable: temporarily unavailable; only verify retries · body `Error`

### Success body fields

- **Shape 1 of 2**
- `valid` (true, required)
- `tokenId` (string, required)
- `accountId` (string, required)
- `userId` (string | null, required)
- `tool` (string, required)
- `expiresAt` (number, required): Unix epoch milliseconds.
- `callId` (string, required)
- `replayed` (boolean, required)
- **Shape 2 of 2**
- `valid` (false, required)
- `reason` ("unknown" | "expired" | "revoked" | "out_of_scope" | "approval_changed" | "disabled", required)

Failures are not verdicts. Error bodies follow the `Error` schema: `code` is one of `bad_request`, `unauthorized`, `session_reinit_required`, `forbidden`, `not_found`, `conflict`, `identity_required`, `payload_too_large`, `rate_limited`, `internal_error`, `service_unavailable`, `request_failed`, `approval_invalid`, `approval_used`, `approval_expired`, `approval_mismatch`, `step_up_not_held`, `step_up_mismatch`, `step_up_settled`, `step_up_expired`, `step_up_superseded`, `agent_tokens_disabled`, `tool_not_approved`, `tool_not_read_only`. [Errors and retries](/docs/errors) explains each code and what to do.

## Example

```sh tab=curl
curl -sS -X POST 'https://app.trytelltale.dev/api/v1/agent-tokens/verify' \
  -H "Authorization: Bearer $TELLTALE_SERVER_KEY" \
  -H 'Content-Type: application/json' \
  --data '{"token":"tt_agent_PASTE_AGENT_TOKEN","tool":"search_docs","eventId":"call_00000001"}'
```

```js tab=fetch
const response = await fetch("https://app.trytelltale.dev/api/v1/agent-tokens/verify", {
  method: "POST",
  headers: {
    Authorization: 'Bearer ' + process.env.TELLTALE_SERVER_KEY,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    "token": "tt_agent_PASTE_AGENT_TOKEN",
    "tool": "search_docs",
    "eventId": "call_00000001"
  }),
  signal: AbortSignal.timeout(5000)
});
const result = await response.json();
```

Machine-readable contract: [openapi.json](https://app.trytelltale.dev/openapi.json). Request builder: the [API explorer](/docs/api-explorer) shows every operation as curl; it sends requests only on a local dashboard.