Welcome to the Emailchaser API
Emailchaser's REST API runs your cold email from your own code. Add leads, launch and pause campaigns, connect mailboxes, read replies, order domains and get every event pushed to your server. If you run a lead gen agency, a sales team or a GTM stack, everything you do in the app you can script here.
You can make your first call in two minutes
- Create an API key on the API & MCP page in the app. Start here walks through it.
- Check the key works by listing your newest campaign:
Shell
curl "https://api.emailchaser.com/r/campaigns?limit=1" \
-H "Authorization: Bearer $EMAILCHASER_API_KEY"- Add your first leads to a campaign with
POST /leads. Add leads to a campaign shows the request.
Every endpoint speaks JSON with one key
| What | How it works |
|---|---|
| Base URL | https://api.emailchaser.com/r |
| Authentication | Authorization: Bearer <API key>, read-only or read and write (details) |
| Rate limits | Plan for up to 100 requests per 10 seconds per account (details) |
| Errors | A standard HTTP status and a JSON body with an error message (details) |
| Events | Signed webhooks for sends, replies, bounces, category changes and more (details) |
| Machine-readable | OpenAPI definition, Postman collection, llms.txt |
AI agents can use the same keys through MCP
Emailchaser runs a hosted MCP server at https://app.emailchaser.com/api/mcp. Claude, Cursor and other MCP clients connect with the same API keys and the same two scopes, and get the same endpoints as tools.
Browse the API reference
AudienceCount how many people match your targeting before you spend anything. Free, and never uses credits.1 endpoint →AutopilotPlan and run Autopilot: describe who you sell to and a budget, approve the plan, and Emailchaser builds and runs the outbound for you.8 endpoints →BlocklistAddresses and domains that must never be emailed, for one workspace or for the whole account.6 endpoints →CampaignsCreate, read, schedule, launch, pause and delete campaigns, and manage the emails and mailboxes each one uses.14 endpoints →CopilotPlan a whole campaign from your website and a description of your buyer, then launch it in one call.2 endpoints →CreditsYour credit balance, every credit transaction, and buying more credits with the card on file.3 endpoints →Done For YouSearch and check domains, then order ready-to-send domains and mailboxes and track the order.6 endpoints →Email VerificationVerify a list of email addresses in bulk, with no campaign and no sending, and download the results.7 endpoints →ICPsYour ideal customer profiles: who you sell to, saved as targeting you can reuse, with a live audience size.8 endpoints →ImportsBring your campaigns, leads and sending accounts over from Instantly.2 endpoints →Inbox PlacementRead Inbox Placement results: where your emails land (inbox, tabs or spam) across Gmail, Outlook and Yahoo, and your senders' reputation.7 endpoints →Lead FinderSearch Emailchaser's B2B contact database for free, then add the people you want to a campaign. Adding people reveals their details and spends credits.7 endpoints →LeadsAdd leads in bulk (up to 1,000 per request), read, update and delete them, and read a lead's conversation.6 endpoints →MeetingsMark a lead as having booked a meeting, or take the mark off.2 endpoints →ProspectingFill a campaign with people from Emailchaser's contact database who match an Ideal Customer Profile. Revealing them spends credits.1 endpoint →RepliesRead what prospects wrote back, then edit and send the reply drafts Emailchaser wrote for them.5 endpoints →ReportsPut what you spent against what it produced, for any date range.1 endpoint →Sender EmailsThe mailboxes your campaigns send from: list and connect them, check their DNS, health and warm-up.7 endpoints →SetupCheck that an API key works. Built for AI assistants, which call it first to confirm their connection.1 endpoint →WebhooksRegister, update and delete webhook endpoints that receive Emailchaser events as they happen.4 endpoints →WorkspaceCreate workspaces and their API keys, read members, and set the billing profile that done-for-you orders use.6 endpoints →
Questions about the API? Email support@emailchaser.com.