Smartlead
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.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Smartlead the way a machine reads it — 31 machine-readable artifacts across 1 API, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Smartlead scores 60.4/100 (strong), with a separate agent-readiness read of 40/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Smartlead
Each block below is one kind of artifact we hold for Smartlead. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 19
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Smartlead Campaigns API
REST endpoints to create, list, fetch, update, schedule, pause, resume, and delete email campaigns, plus manage sequences, A/B variants, and sender account assignments inside a ...
Smartlead Leads API
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.
Smartlead Email Accounts API
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.
Smartlead Email Warmup API
Endpoints for managing Smartlead's deliverability warmup engine — enabling warmup per mailbox, configuring ramp settings, and reading warmup reputation and stats.
Smartlead Webhooks API
CRUD endpoints for user, client and campaign-scoped webhook subscriptions covering lead events (sent, opened, clicked, replied, bounced, unsubscribed) used to stream Smartlead a...
Smartlead Analytics API
Endpoints for campaign and account-level analytics — sent, open, click, reply, bounce, and unsubscribe metrics aggregated over time ranges.
Smartlead Client Management API
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 Campaign Statistics API
Retrieve campaign performance metrics.
Smartlead Campaigns API
Manage Smartlead email campaigns.
SmartLead Documentation MCP Server
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 Analytics API
Global analytics and reporting across all campaigns
Smartlead Authentication API
User authentication and account management
Smartlead Email Accounts API
Configure and manage email sending accounts
Smartlead Leads API
Manage leads and prospects across campaigns
Smartlead Master Inbox API
Unified inbox for all campaign communications
Smartlead Smart Delivery API
Email deliverability testing and monitoring
Smartlead Smart Senders API
Automated email account provisioning marketplace
Smartlead Utilities API
Utility endpoints for various operations
Smartlead Webhooks API
Configure webhooks for real-time event notifications
Scroll within the panel for all 19 ·
Open Collections 4
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONSmartlead Campaign Statistics API
OPEN COLLECTIONSmartlead Campaign Statistics Campaigns API
OPEN COLLECTIONSmartlead API
OPEN COLLECTIONMCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Smartlead MCP Server
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...
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Smartlead Ai Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Smartlead Ai Finops
FINOPSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Smartlead Ai Webhooks
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Smartlead — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 6
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 4
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/smartlead-ai · machine-readable index on apis.io
This is an independent, third-party profile of Smartlead, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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