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.

Smartlead publishes 3 APIs on the APIs.io network, including Campaign Statistics API, Campaigns API, and 1 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 34 more developer resources.

🌐 Visit website 📡 Source on GitHub

63.6/100 strong ▬ flat Agent 38/100 agent ready Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessPaidSelf serveFree trial⚡ Free to try

11 APIs 1 MCP Servers

Cold Email Outbound Sales Deliverability Email Warm-up Automation Sequences

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 63.6/100 · strong

Contract Quality 16.6 / 25

Developer Ergonomics 14.3 / 20

Access Clarity 17.1 / 20

Operational Transparency 5.5 / 13

Contract Governance 2.0 / 12

Discoverability 8.2 / 10

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/smartlead-ai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 11

Individual APIs this provider publishes, each with its own machine-readable definition.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Smartlead Ai Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 6

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

MCPServer

LLMsTxt

WellKnown

LlmsText

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Webhooks

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

Compliance

Compliance

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 4

Status, limits, changes, and where to get help

RateLimits

Roadmap

Support

Help

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Twitter

Twitter

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Overlay

Overlay

App

App

Source (apis.yml)

aid: smartlead-ai
url: https://raw.githubusercontent.com/api-evangelist/smartlead-ai/refs/heads/main/apis.yml
name: Smartlead
kind: company
description: 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.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: true
  try_now: true
  public: true
  label: Paid · Free trial · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-08-13'
  method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/smartlead-ai.png
tags:
- Cold Email
- Outbound
- Sales
- Deliverability
- Email Warm-up
- Automation
- Sequences
tags_raw:
- Cold Email
- Outbound
- Sales
- Deliverability
- Email Warmup
- Automation
- Sequences
created: '2026-05-23'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: smartlead-ai:smartlead-api
  name: SmartLead API
  description: The complete SmartLead REST API as published by SmartLead — OpenAPI 3.1.1, 85 paths and 98 operations across
    campaigns, sequences, leads and lead lists, email accounts and warmup, the master inbox, webhooks, analytics, campaign
    statistics, Smart Delivery, Smart Senders and utilities. Harvested verbatim from the SmartLead documentation host.
  humanURL: https://api.smartlead.ai/api-reference
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Campaigns
  - Leads
  - Email Accounts
  - Webhook
  - Analytics
  - Deliverability
  tags_raw:
  - Campaigns
  - Leads
  - Email Accounts
  - Webhooks
  - Analytics
  - Deliverability
  properties:
  - type: OpenAPI
    url: openapi/smartlead-ai-openapi.yml
  - type: Documentation
    url: https://api.smartlead.ai/introduction
  - type: APIReference
    url: https://api.smartlead.ai/api-reference
  - type: Overlay
    url: overlays/smartlead-ai-openapi-overlay.yaml
- aid: smartlead-ai:campaigns-api
  name: Smartlead Campaigns API
  description: 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 campaign.
  humanURL: https://api.smartlead.ai/api-reference/campaigns
  baseURL: https://server.smartlead.ai/api/v1/campaigns
  tags:
  - Campaigns
  - Sequences
  - Scheduling
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/core/campaigns
- aid: smartlead-ai:leads-api
  name: Smartlead Leads API
  description: 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.
  humanURL: https://api.smartlead.ai/api-reference/leads
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Leads
  - Contacts
  - Prospects
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/core/leads
- aid: smartlead-ai:email-accounts-api
  name: Smartlead Email Accounts API
  description: 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.
  humanURL: https://api.smartlead.ai/api-reference/email-accounts
  baseURL: https://server.smartlead.ai/api/v1/email-accounts
  tags:
  - Email Accounts
  - SMTP
  - Mailboxes
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/core/email-accounts
- aid: smartlead-ai:email-warmup-api
  name: Smartlead Email Warmup API
  description: Endpoints for managing Smartlead's deliverability warmup engine — enabling warmup per mailbox, configuring
    ramp settings, and reading warmup reputation and stats.
  humanURL: https://api.smartlead.ai/guides/email-warmup
  baseURL: https://server.smartlead.ai/api/v1/email-accounts
  tags:
  - Warmup
  - Deliverability
  - Reputation
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/guides/email-warmup
- aid: smartlead-ai:webhooks-api
  name: Smartlead Webhooks API
  description: CRUD endpoints for user, client and campaign-scoped webhook subscriptions covering lead events (sent, opened,
    clicked, replied, bounced, unsubscribed) used to stream Smartlead activity to external systems.
  humanURL: https://api.smartlead.ai/api-reference/webhooks/events
  baseURL: https://server.smartlead.ai/api/v1/webhooks
  tags:
  - Webhook
  - Event
  - Subscription
  tags_raw:
  - Webhooks
  - Events
  - Subscriptions
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/core/webhooks
  - type: Webhooks
    url: asyncapi/smartlead-ai-webhooks.yml
- aid: smartlead-ai:analytics-api
  name: Smartlead Analytics API
  description: Endpoints for campaign and account-level analytics — sent, open, click, reply, bounce, and unsubscribe metrics
    aggregated over time ranges.
  humanURL: https://api.smartlead.ai/api-reference/analytics
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Analytics
  - Reporting
  - Metrics
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/api-reference
- aid: smartlead-ai:client-management-api
  name: Smartlead Client Management API
  description: 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.
  humanURL: https://api.smartlead.ai/api-reference/clients
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Clients
  - Agency
  - Multi-Tenant
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/api-reference
- aid: smartlead-ai:smartlead-ai-campaign-statistics-api
  name: Smartlead Campaign Statistics API
  description: Retrieve campaign performance metrics.
  humanURL: https://api.smartlead.ai/api-reference/campaign-statistics
  baseURL: https://server.smartlead.ai/api/v1/campaigns
  tags:
  - Campaign Statistics
  properties:
  - type: OpenAPI
    url: openapi/smartlead-ai-campaign-statistics-api-openapi.yml
- aid: smartlead-ai:smartlead-ai-campaigns-api
  name: Smartlead Campaigns API
  description: Manage Smartlead email campaigns.
  humanURL: https://api.smartlead.ai/api-reference/campaigns
  baseURL: https://server.smartlead.ai/api/v1/campaigns
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/smartlead-ai-campaigns-api-openapi.yml
- aid: smartlead-ai:mcp-server
  name: SmartLead Documentation MCP Server
  description: 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 SmartLead documentation and OpenAPI to agents; it does
    not execute SmartLead REST operations.
  humanURL: https://api.smartlead.ai/introduction
  baseURL: https://api.smartlead.ai/mcp
  tags:
  - MCP
  - Agents
  - Documentation
  properties:
  - type: MCPServer
    url: mcp/smartlead-ai-mcp.yml
  - type: ToolCrosswalk
    url: mcp/smartlead-ai-tool-crosswalk.yml
common:
- type: AgenticAccess
  url: agentic-access/smartlead-ai-agentic-access.yml
- type: AgentCard
  url: a2a/smartlead-ai-a2a.yml
- type: AgentSkill
  url: skills/_index.yml
- type: MCPServer
  url: mcp/smartlead-ai-mcp.yml
- type: ToolCrosswalk
  url: mcp/smartlead-ai-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/smartlead-ai-llms.txt
- type: Authentication
  url: authentication/smartlead-ai-authentication.yml
- type: Conventions
  url: conventions/smartlead-ai-conventions.yml
- type: ErrorCatalog
  url: errors/smartlead-ai-problem-types.yml
- type: RateLimits
  url: rate-limits/smartlead-ai-rate-limits.yml
- type: Plans
  url: plans/smartlead-ai-plans-pricing.yml
- type: Lifecycle
  url: lifecycle/smartlead-ai-lifecycle.yml
- type: Webhooks
  url: asyncapi/smartlead-ai-webhooks.yml
- type: DataModel
  url: data-model/smartlead-ai-data-model.yml
- type: Conformance
  url: conformance/smartlead-ai-conformance.yml
- type: Compliance
  url: https://www.smartlead.ai/dpa
- type: Packages
  url: packages/smartlead-ai-packages.yml
- type: CLI
  url: cli/smartlead-ai-cli.yml
- type: Overlay
  url: overlays/smartlead-ai-openapi-overlay.yaml
- type: WellKnown
  url: well-known/smartlead-ai-well-known.yml
- type: DomainSecurity
  url: security/smartlead-ai-domain-security.yml
- type: Website
  url: https://www.smartlead.ai
- type: App
  url: https://app.smartlead.ai
- type: DeveloperPortal
  url: https://api.smartlead.ai/introduction
- type: Documentation
  url: https://api.smartlead.ai/introduction
- type: APIReference
  url: https://api.smartlead.ai/api-reference
- type: GettingStarted
  url: https://api.smartlead.ai/quickstart
- type: GitHubOrganization
  url: https://github.com/Smartlead-Public
- type: Roadmap
  url: https://roadmap.smartlead.ai
- type: Pricing
  url: https://www.smartlead.ai/pricing
- type: Blog
  url: https://www.smartlead.ai/blog
- type: SignUp
  url: https://app.smartlead.ai/signup
- type: Login
  url: https://app.smartlead.ai/login
- type: Support
  url: https://help.smartlead.ai
- type: Help
  url: https://help.smartlead.ai
- type: PrivacyPolicy
  url: https://www.smartlead.ai/privacy-policy
- type: TermsOfService
  url: https://www.smartlead.ai/new-terms-and-conditions
- type: LinkedIn
  url: https://www.linkedin.com/company/smartleadhq
- type: Twitter
  url: https://x.com/smartlead_ai
- type: YouTube
  url: https://www.youtube.com/@smartlead
- type: LlmsText
  url: https://api.smartlead.ai/llms.txt
integrations:
- name: Clay
- name: HubSpot
- name: Salesforce
- name: Pipedrive
- name: Zapier
- name: Make
- name: n8n
- name: Slack
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 20
  pass: local-v1

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