Rate limits

Requests per minute, plan quotas and what platforms allow.

Per credential

Each API key or OAuth connection can make 120 requests a minute. An MCP tool call counts as one request. Going over returns:

HTTP/1.1 429 Too Many Requests
Retry-After: 60

{ "error": { "code": "RATE_LIMITED", "message": "More than 120 requests in a minute. Wait a minute and try again." } }

Wait for Retry-After seconds, then continue. Spread bulk jobs out rather than retrying in a tight loop.

Plan quotas

Quota	Counted
Posts a month	Per account a post goes to (one post to three accounts counts as three), by scheduled month in the workspace time zone. Drafts don’t count.
Connected accounts	Across every workspace on the subscription.
Media storage	Total size of files across the subscription’s workspaces.

Hitting one returns 402 PLAN_LIMIT with a message saying which.

Platform limits

Platforms cap how much an account can publish (for example, Instagram allows 100 API posts per account in 24 hours, and an unaudited TikTok app can post for a few users a day). PostFlow retries temporary errors and reports the rest on the target’s errorMessage. See each platform page.