Smartlead website screenshot

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 exposes a REST API at server.smartlead.ai/api/v1 covering campaigns, leads, email accounts, email warmup, webhooks, analytics, and client management, with API key authentication via query parameter.

Smartlead publishes 2 APIs on the APIs.io network: Campaign Statistics API and Campaigns API. Tagged areas include Cold Email, Outbound, Sales, Deliverability, and Email Warmup.

Smartlead’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, engineering blog, signup flow, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
47.7/100 developing ▬ flat Agent 34/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreeSelf serve⚡ Free to try
9 APIs
Cold EmailOutboundSalesDeliverabilityEmail WarmupAutomationSequences

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 47.7/100 · developing
Contract Quality 15.0 / 25
Developer Ergonomics 7.8 / 20
Commercial Clarity 14.7 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 34/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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 9

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.

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 campaign-scoped webhook subscriptions covering lead events (sent, opened, clicked, replied, bounced, unsubscribed) used to stream Smartlead activity to extern...

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, assign permissions, and meter usage across multiple end customers.

Smartlead Campaign Statistics API

Retrieve campaign performance metrics.

Smartlead Campaigns API

Manage Smartlead email campaigns.

Scroll for all 9

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Smartlead API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Smartlead Ai Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Smartlead Ai Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Smartlead Ai Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Smartlead Ai Authentication

apiKey · 1 scheme

SECURITY

Smartlead Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Smartlead Ai Agentic Access

5 operations · 2 acting

5 operations · 2 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted
 Signup
Signup
 Login
Login

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Learn 1

Tutorials, courses, talks, and written guidance

YouTube
YouTube

Operate 1

Status, limits, changes, and where to get help

Help
Help

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 4

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn
 Twitter
Twitter

Other 1

Properties that don't map to a standard resource type

App
App

Source (apis.yml)

apis.yml Raw ↑ 
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 exposes a REST API at server.smartlead.ai/api/v1
  covering campaigns, leads, email accounts, email warmup, webhooks, analytics, and client management, with API key authentication
  via query parameter.
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/smartlead-ai.png
tags:
- Cold Email
- Outbound
- Sales
- Deliverability
- Email Warmup
- Automation
- Sequences
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis:
- 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/reference/campaigns
  baseURL: https://server.smartlead.ai/api/v1/campaigns
  tags:
  - Campaigns
  - Sequences
  - Scheduling
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/reference
- 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.
  humanURL: https://api.smartlead.ai/reference/leads
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Leads
  - Contacts
  - Prospects
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/reference
- 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/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/reference
- 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/reference/email-warmup
  baseURL: https://server.smartlead.ai/api/v1/email-accounts
  tags:
  - Warmup
  - Deliverability
  - Reputation
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/reference
- aid: smartlead-ai:webhooks-api
  name: Smartlead Webhooks API
  description: CRUD endpoints for 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/reference/webhooks
  baseURL: https://server.smartlead.ai/api/v1/webhooks
  tags:
  - Webhooks
  - Events
  - Subscriptions
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/reference
- 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/reference/analytics
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Analytics
  - Reporting
  - Metrics
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/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, assign permissions, and meter
    usage across multiple end customers.
  humanURL: https://api.smartlead.ai/reference/client-management
  baseURL: https://server.smartlead.ai/api/v1
  tags:
  - Clients
  - Agency
  - Multi-Tenant
  properties:
  - type: Documentation
    url: https://api.smartlead.ai/reference
- aid: smartlead-ai:smartlead-ai-campaign-statistics-api
  name: Smartlead Campaign Statistics API
  description: Retrieve campaign performance metrics.
  humanURL: https://api.smartlead.ai/reference/campaigns
  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/reference/campaigns
  baseURL: https://server.smartlead.ai/api/v1/campaigns
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/smartlead-ai-campaigns-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/smartlead-ai-agentic-access.yml
- type: DomainSecurity
  url: security/smartlead-ai-domain-security.yml
- type: Authentication
  url: authentication/smartlead-ai-authentication.yml
- type: Website
  url: https://www.smartlead.ai
- type: App
  url: https://app.smartlead.ai
- type: Documentation
  url: https://api.smartlead.ai/reference
- type: APIReference
  url: https://api.smartlead.ai/reference
- type: GettingStarted
  url: https://api.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: Help
  url: https://help.smartlead.ai
- type: PrivacyPolicy
  url: https://www.smartlead.ai/privacy-policy
- type: TermsOfService
  url: https://www.smartlead.ai/terms-of-service
- 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