damientilman/mailchimp-mcp-server

Reliability, robustness and distribution release. Minor bump, no breaking changes to tool signatures.

Fixed

• False success on writes — around 20 write/destructive tools (send_campaign, send_test_email, schedule_campaign, cancel_send, delete_campaign, pause_automation, and the delete_* family) discarded the API result and always reported success. A rejected send read as sent, a failed delete as deleted, a failed GDPR erase as permanently_deleted. They now surface the real API error.
• Malformed JSON in batch_subscribe / create_segment / update_segment / create_batch returns a readable error instead of raising.
• Path parameters containing .. are rejected before dispatch.
• Audit log redacts subscriber PII (email_address, email, merge_fields) at any depth.
• tag_member no longer claims "read scope required"; idempotency hints match their docstrings; delete_member / delete_member_permanent docs corrected.

Added

• Automatic retries on 429/5xx with exponential backoff and Retry-After (MAILCHIMP_MAX_RETRIES, default 3). Timeouts are not retried.
• Connection pooling — one keep-alive session per account.
• Response size cap for campaign bodies (MAILCHIMP_MAX_CONTENT_CHARS, default 100000) so a large template can't blow the context window.
• Tool profiles — MAILCHIMP_TOOLS exposes a subset (by risk tier or name) to shrink the tool-list payload.
• Docker image on GHCR (ghcr.io/damientilman/mailchimp-mcp-server) each release.

Changed

• create_batch is now classified destructive (it can wrap arbitrary DELETEs); batch_subscribe stays write.
• Email addresses are validated before use; batch_subscribe enforces the 500-member cap; offset must be non-negative.
• Leaner tool descriptions trim the tool-list footprint by ~18%.

Install: `uvx mailchimp-mcp` or `docker run --rm -i -e MAILCHIMP_API_KEY=... ghcr.io/damientilman/mailchimp-mcp-server:latest`

Full changelog: https://github.com/damientilman/mailchimp-mcp-server/blob/main/CHANGELOG.md