Smartlead is cold email infrastructure for outbound sales and lead generation, focused on inbox deliverability through unlimited mailbox rotation, automated warmup, and a unified master inbox. Smartlead publishes an OpenAPI 3.1.1 contract with 98 operations at server.smartlead.ai/api/v1 covering campaigns, sequences, leads and lead lists, sender mailboxes and warmup, the master inbox, webhooks, analytics, Smart Delivery placement testing, Smart Senders and agency client management, authenticated with an API key passed as a query parameter. It also ships an unusually forward agent surface for its size — an A2A agent card, a published Agent Skill, a remote documentation MCP server, llms.txt, and a first-party CLI — alongside a 13-event signed webhook catalog.
Smartlead publishes 19 API contracts indexed on the APIs.io network, including Campaign Statistics API, Campaigns API, Analytics API, and 16 more. Tagged areas include Cold Email, Outbound, Sales, Deliverability, and Email Warm-up.
The Smartlead catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Smartlead’s developer surface includes authentication, CLI, documentation, API reference, getting-started guide, pricing, engineering blog, and 36 more developer resources.
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Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
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Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it
carries 10 points of the composite. It is scored from the published contracts
themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already
holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in
front of it, and the first time that check is skipped a duplicate record is created.
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because the conditional facet above carries the other
25. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 75% of its nominal
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Endpoints to add leads to a campaign in bulk, fetch leads, update lead status (interested, replied, unsubscribed), search leads globally, and manage lead categories and lead lists.
Endpoints to add, list, update, and remove sender mailboxes (SMTP, Gmail, Outlook), assign them to campaigns, and track per-account sending limits and warmup state.
CRUD endpoints for user, client and campaign-scoped webhook subscriptions covering lead events (sent, opened, clicked, replied, bounced, unsubscribed) used to stream Smartlead a...
Endpoints for agency users to provision and manage white-labeled client accounts, mint and revoke per-client API keys, and meter usage across multiple end customers.
SmartLead's remote Model Context Protocol server. tools/list answers anonymously with three documentation tools (search, a read-only docs filesystem, feedback). It exposes the S...
SmartLead operates a remote MCP server on its documentation/API host. `tools/list` answered anonymously over Streamable HTTP (SSE), so the tool set below is the server's real, l...
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
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