Cold email platform with built-in email warmup and campaign management at scale. Type: API Key (query parameter) Env var: INSTANTLY_API_KEY Get key: Instantly S
Instantly is a cold email platform designed to manage outreach campaigns at scale with built-in email warmup and deliverability monitoring. It provides REST API access to create, launch, pause, and analyze campaigns, as well as manage leads and connected email accounts. Practitioners can track key metrics like open rates, reply rates, and step-by-step campaign performance to optimize outreach effectiveness.
This skill is ideal for performance marketers running large-scale link-building or lead generation campaigns who need reliable email warmup to maintain inbox health. Growth leads managing outbound outreach can benefit from automated campaign controls and detailed analytics to iterate messaging. Agencies handling multiple client accounts will find value in monitoring account-level deliverability and managing blocklists to protect sender reputation.
Users typically start by connecting and warming up email accounts to ensure deliverability before launching outreach campaigns. Next, they create and configure campaigns via the API or CLI, adding segmented leads with relevant contact details. During campaign execution, practitioners monitor status and engagement metrics in real time, pausing or adjusting campaigns if performance dips. Finally, detailed analytics on campaign steps and account health guide optimization for future outreach cycles.
How do I check the status of an ongoing campaign? Use the campaigns status command with the campaign ID to get real-time updates. Can I add or remove leads mid-campaign? Yes, leads can be added or deleted dynamically via the leads add and leads delete commands. What level of rate limiting should I expect? API rate limits vary by plan, but staying under 10 requests per second is recommended to avoid throttling.
Attach the Instantly skill to a Metaflow agent task by configuring the API key environment variable and specifying campaign or lead management actions. Expect seamless execution of campaign launches, lead additions, and analytics retrieval within your workflow, enabling automated cold email outreach at scale. This skill integrates directly with Metaflow’s task orchestration to help you monitor and optimize outreach performance across multiple campaigns.
For broader context, see our roundup of claude skills marketing, and read Claude Code workflows for marketing agencies for related setup guidance.