Intercom Common Errors

Overview

Quick reference for diagnosing and fixing Intercom REST API errors by HTTP

status code. Every Intercom error returns the same envelope, so triage is

fast: read the errors[].code, match it to the table below, apply the fix.

All Intercom errors share this shape:

{
  "type": "error.list",
  "request_id": "req_abc123",
  "errors": [{ "code": "unauthorized", "message": "Access Token Invalid" }]
}

The full per-code catalog (causes + copy-paste fixes) lives in

references/error-reference.md.

Prerequisites

• An Intercom access token in INTERCOMACCESSTOKEN (Developer Hub > Your App > Authentication).
• curl and jq for the diagnostic commands.
• For the TypeScript fixes: the intercom-client SDK (npm install intercom-client).

Instructions

1. Capture the error. Grab the HTTP status and the JSON body. Use Read on your app logs, or Grep the codebase for the failing call site to see how the request is built.
2. Match the code. Find the errors[].code in the Error Handling table below.
3. Confirm the token/limits first. Run the diagnostic script in references/diagnostics.md to rule out auth and rate-limit issues in one shot.
4. Apply the fix. Open references/error-reference.md, jump to your status code, and use the causes + fix snippet there.
5. Retry only retryable errors. 429 and 5xx are retryable with backoff; 4xx client errors are not — fix the request instead.

Fast auth check:

curl -s https://api.intercom.io/me \
  -H "Authorization: Bearer $INTERCOM_ACCESS_TOKEN" \
  -H "Accept: application/json" | jq '.type'
# Returns "admin" when the token is valid

Output

You resolve the request into one of three outcomes:

• Fixed request — a corrected token, added OAuth scope, valid payload, or existence check that makes the call succeed.
• Backoff-and-retry — for 429 / 5xx, a retry wrapper that respects X-RateLimit-Reset and exponential backoff.
• Escalation — for persistent 5xx, the request_id to hand to Intercom support along with the status-page state.

Error Handling

Limits: 10,000 req/min per app, 25,000 req/min per workspace. On 429,

read X-RateLimit-Reset and wait until that epoch before retrying.

Examples

401 — invalid token. The auth check returns nothing instead of "admin". Regenerate the token in Developer Hub and update the app's env. Full walkthrough: references/error-reference.md.

409 — duplicate contact. create fails because the email/external_id already exists. Search first, then create:

const existing = await client.contacts.search({
  query: { field: "email", operator: "=", value: email },
});
return existing.data.length > 0
  ? existing.data[0]
  : client.contacts.create({ role: "user", email, externalId });

429 — rate limited. Wrap the call in exponential backoff that honors

X-RateLimit-Reset. Full retry helper: references/error-reference.md.

For a full triage sweep (auth + rate limit + Intercom status in one command),

run the script in references/diagnostics.md.

Resources

• Error Codes
• HTTP Responses
• Rate Limiting
• Intercom Status
• Full error reference — per-code causes and fixes
• Diagnostics — one-shot health-check script

Next Steps

For deeper, end-to-end debugging of an Intercom integration — capturing request/response pairs, replaying failing calls, and correlating request_ids across a session — see the intercom-debug-bundle skill in this pack.