SendGrid

SendGrid API integration with managed OAuth. Send emails, manage contacts, templates, suppressions, statistics, sender identities, unsubscribe groups, and SendGrid API keys. All write operations require explicit user approval. Sending emails delivers messages to real recipients — confirm audience, content, and sender before executing. API key management creates long-lived credentials that persist beyond the session — only use when explicitly requested. Use this skill when users want to send transactional or marketing emails, manage email lists, handle bounces/unsubscribes, or analyze email performance. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway). Requires network access and valid Maton API key. Calls run through the `maton` CLI with OAuth login, or over raw HTTP with a Maton API key where the CLI cannot be installed. The endpoints documented here are the intended surface, not a technical limit — the `maton api` passthrough can reach others the connection permits. Default to read and list calls, and confirm every write or new connection with the user.