Instantly

Instantly is a cold email outbound platform that combines mailbox sending infrastructure, email warmup, a B2B lead database, deliverability tools, and a unified inbox for replies. The Instantly v2 REST API at api.instantly.ai/api/v2 covers campaigns, leads, accounts, email verification, inbox placement tests, webhooks, analytics, API keys, and workspaces, with Bearer token authentication and scoped API keys.

Instantly publishes 1 API on the APIs.io network: Campaigns API. Tagged areas include Cold Email, Outbound, Sales, Deliverability, and Lead Database.

Instantly’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, engineering blog, signup flow, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.1/100 developing ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreeSelf serve⚡ Free to try

1 APIs

Cold EmailOutboundSalesDeliverabilityLead DatabaseEmail VerificationWebhooks

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 47.1/100 · 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 6.9 / 10

Agent readiness — 31/100 · 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 0 / 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/instantly-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 1

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

GraphQL 1

GraphQL schemas published by this provider.

Rate Limits 1

Documented rate limits and quota policies.

Instantly Ai Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Signup

Signup

Login

Documentation 4

Reference material describing how the API behaves

Documentation

APIReference

OpenAPI

GraphQL

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

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

Twitter

Twitter

Other 1

Properties that don't map to a standard resource type

App

App

Source (apis.yml)

aid: instantly-ai
url: https://raw.githubusercontent.com/api-evangelist/instantly-ai/refs/heads/main/apis.yml
name: Instantly
kind: company
description: Instantly is a cold email outbound platform that combines mailbox sending infrastructure, email warmup, a B2B
  lead database, deliverability tools, and a unified inbox for replies. The Instantly v2 REST API at api.instantly.ai/api/v2
  covers campaigns, leads, accounts, email verification, inbox placement tests, webhooks, analytics, API keys, and workspaces,
  with Bearer token authentication and scoped API keys.
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/instantly-ai.png
tags:
- Cold Email
- Outbound
- Sales
- Deliverability
- Lead Database
- Email Verification
- Webhooks
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis:
- aid: instantly-ai:instantly-ai-campaigns-api
  name: Instantly Campaigns API
  description: The Campaigns API from Instantly — 10 operation(s) for campaigns.
  humanURL: https://developer.instantly.ai/api-reference/groups/campaign
  baseURL: https://api.instantly.ai/api/v2/campaigns
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/instantly-ai-campaigns-api-openapi.yml
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/campaign
  - type: GraphQL
    url: graphql/instantly-ai-graphql.md
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/lead
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/account
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/email-verification
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/inbox-placement-test
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/webhook
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/analytics
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/api-key
  - type: Documentation
    url: https://developer.instantly.ai/api-reference/groups/workspace
common:
- type: AgenticAccess
  url: agentic-access/instantly-ai-agentic-access.yml
- type: DomainSecurity
  url: security/instantly-ai-domain-security.yml
- type: Authentication
  url: authentication/instantly-ai-authentication.yml
- type: Website
  url: https://instantly.ai
- type: App
  url: https://app.instantly.ai
- type: Documentation
  url: https://developer.instantly.ai
- type: APIReference
  url: https://developer.instantly.ai/api-reference
- type: GettingStarted
  url: https://developer.instantly.ai/getting-started/getting-started
- type: Authentication
  url: https://developer.instantly.ai/getting-started/authorization
- type: OpenAPI
  url: https://api.instantly.ai/openapi/api_v2.json
- type: Pricing
  url: https://instantly.ai/pricing
- type: Blog
  url: https://instantly.ai/blog
- type: Help
  url: https://help.instantly.ai
- type: Signup
  url: https://app.instantly.ai/auth/signup
- type: Login
  url: https://app.instantly.ai/auth/login
- type: PrivacyPolicy
  url: https://instantly.ai/privacy-policy
- type: TermsOfService
  url: https://instantly.ai/terms
- type: LinkedIn
  url: https://www.linkedin.com/company/instantlyai
- type: Twitter
  url: https://x.com/Instantlydotai
- type: YouTube
  url: https://www.youtube.com/@instantly-ai
- type: LlmsText
  url: https://developer.instantly.ai/llms.txt
- url: graphql/instantly-ai-graphql.md
  type: GraphQL
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

Instantly

Kin Score

APIs 1

Instantly Campaigns API

Open Collections 1

Instantly.ai API v2

GraphQL 1

Instantly GraphQL Schema

Pricing Plans 1

Instantly Ai Plans Pricing

Rate Limits 1

Instantly Ai Rate Limits

FinOps 1

Instantly Ai Finops

Security Posture 2

Instantly Ai Authentication

Instantly Ai Domain Security

Agentic Access 1

Instantly Ai Agentic Access

Resources