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 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.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Instantly the way a machine reads it — 43 machine-readable artifacts across 3 APIs, 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 — Instantly scores 65.7/100 (strong), with a separate agent-readiness read of 57/100 (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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How we profile Instantly
Each block below is one kind of artifact we hold for Instantly. 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 30
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.
Instantly Campaigns API
The Campaigns API from Instantly — 10 operation(s) for campaigns.
Instantly Account API
An email account that can be used to send campaigns
Instantly Account Campaign Mapping API
Account Campaign Mapping
Instantly Analytics API
Endpoints related to analytics
Instantly API Key API
API Key
Instantly Audit Log API
Audit log records for tracking system activities
Instantly Background Job API
A background job that can be used to perform long-running tasks
Instantly Block List Entry API
A blocked email or domain
Instantly Campaign API
A campaign that can be sent to a list of recipients
Instantly Campaign Subsequence API
A subsequence entity representing a follow-up sequence
Instantly CRM Actions API
CRM related actions
Instantly Custom Tag API
A custom tag for organizing and categorizing accounts and campaigns. You can use them as filters in apis that list accounts and campaigns.
Instantly Custom Tag Mapping API
This entity represents a tag being assigned to a specific campaign or email account. When an email account is assigned a tag, a new custom tag mapping entry is created, which co...
Instantly DFY Email Account Order API
A Done-For-You email account order
Instantly Email API
A campaign email, a reply, a manually sent email, or any other email that's visible in the Unibox
Instantly Email Verification API
A single email verification
Instantly Inbox Placement Analytics API
Analytics data for individual emails in inbox placement tests
Instantly Inbox Placement Blacklist And Spam Assassin Report API
Report data for an inbox placement test
Instantly Inbox Placement Test API
An inbox placement test
Instantly Lead API
A lead entity representing an individual lead
Instantly Lead Label API
A custom label for categorizing and managing leads
Instantly Lead List API
A list used to store leads
Instantly O Auth API
OAuth authentication endpoints for connecting Google and Microsoft email accounts
Instantly Super Search Enrichment API
An enrichment can take different forms, such as email enrichment or LinkedIn enrichment. Leads may be imported from SuperSearch using the dedicated endpoint, or enriched directl...
Instantly Webhook API
A webhook subscription for receiving event notifications
Instantly Webhook Event API
A webhook event that was sent or attempted to be sent
Instantly Workspace API
A workspace entity representing a workspace
Instantly Workspace Billing API
Workspace Billing
Instantly Workspace Group Member API
A member of a workspace group. You can use the endpoints within this entity to manage the members of a workspace group.
Instantly Workspace Member API
A member of a workspace with associated user details
Scroll within the panel for all 30 ·
Open Collections 3
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 COLLECTIONInstantly.ai API v2 Campaigns API
OPEN COLLECTIONInstantly.ai API v2
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.
Instantly MCP Server
MCP SERVERGraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
Instantly GraphQL Schema
> **Not a provider surface — modelled, not published.** Instantly ships no GraphQL API. On
GRAPHQLPricing 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.
Instantly 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.
Instantly 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.
Instantly 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.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
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 Instantly — 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 6
Portal, sign-up, and the first successful call
Documentation 3
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 5
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 5
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 4
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/instantly-ai · machine-readable index on apis.io
This is an independent, third-party profile of Instantly, 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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