> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Debug & Monitor

> Diagnose failing calls and watch usage.

When a tool call fails or returns nothing, start with the [Request Logs](https://app.stackone.com/request_logs). They show every request to StackOne and the underlying calls StackOne made to the provider, filterable by account, provider, status, and date. Logs are kept for 90 days.

Click a log entry to see request and response headers, body, and status, plus the **Underlying Requests** tab for the provider-side calls.

## Common errors

| Symptom                      | Likely cause                                                     | Fix                                                                               |
| ---------------------------- | ---------------------------------------------------------------- | --------------------------------------------------------------------------------- |
| `401` / `403`                | Bad API key encoding, or `x-account-id` from a different project | Re-check Basic auth encoding and that the account belongs to your project         |
| Empty tools list             | No actions enabled, or account inactive                          | Enable at least one action in the connector config; confirm the account is active |
| `400` missing `x-account-id` | Client can't send custom headers                                 | Pass `?x-account-id=` as a query param                                            |
| `406 Not Acceptable`         | Missing `Accept` header                                          | Send `Accept: application/json, text/event-stream`                                |
| Tool execution fails         | Bad params, provider error, or rate limit                        | Validate params; check the underlying request in logs                             |

See [MCP Troubleshooting](/embed/call-actions/mcp/troubleshooting) for full error codes and diagnostics.

## Rate limits

API keys are limited to **1000 requests per minute**. Over the limit returns `429 Too Many Requests` with a `Retry-After` header (in seconds) — read it and back off before retrying.

StackOne automatically retries provider-side 429s (up to 5 attempts, within a 60-second request lifetime) using the provider's `Retry-After`. See [Rate Limiting](/platform-api/rate-limiting).

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