# Instantly

**Canonical:** https://apis.io/providers/instantly-ai/  
**Website:** https://instantly.ai  
**APIs profiled:** 2

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 publishes a 173-operation OpenAPI 3.1 covering campaigns and subsequences, leads and lead lists, sending accounts and warmup, email verification, inbox placement tests, SuperSearch enrichment, blocklists, custom tags, audit logs, background jobs, webhooks, analytics, API keys, workspaces and workspace groups. Authentication is a scoped Bearer API key backed by a full OAuth 2.0 authorization server with 178 published scopes, PKCE and dynamic client registration. Instantly also runs a hosted remote MCP server, publishes an A2A agent card, an llms.txt and first-party Agent Skills.

## Kin Score — 67.1 / 100 (exemplar)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 67.1).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 69.2 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 50.0 |
| Developer Ergonomics | 78.6 |
| Commercial Clarity | 84.2 |
| Access Clarity | 84.2 |

## Agent readiness — 60.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | conformant |
| Dry Run Mode | no |

## Access

Paid plan required · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (2)

- **Instantly API v2** — The full Instantly REST API v2 — 129 paths, 173 operations across 28 resource groups, published as OpenAPI 3.1.0 by Instantly at api.instantly.ai/openapi/api_v2.json. Every oper...
- **Instantly Campaigns API** — The Campaigns API from Instantly — 10 operation(s) for campaigns.

## MCP servers (1)

- **Instantly MCP Server**

## Agentic access (1)

- **Instantly Ai Agentic Access** — 186 operations · 112 acting · 2 human-in-the-loop

## Security (2)

- **Instantly Ai Authentication** — http/oauth2 · 2 schemes
- **Instantly Ai Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Instantly Ai Plans Pricing**

## Tags

Cold Email, Outbound, Sales, Deliverability, Lead Database, Email Verification, Webhook

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/instantly-ai/). Scores are computed from the provider's own public artifacts under a published rubric.