LinkupAPI

LinkupAPI provides an outreach API enabling AI agents and software to automate LinkedIn, email, and WhatsApp communications. It offers endpoints for prospect search, profile retrieval, email verification, messaging, and engagement tracking, supporting use cases like lead generation, candidate sourcing, and CRM enrichment. The platform includes a Managed Cloud Platform (MCP) for seamless integration with Claude, Cursor, and other AI tools, delivering real-time data and interaction capabilities across B2B channels.

LinkupAPI is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Outreach, Artificial Intelligence, and Automation.

The LinkupAPI catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

LinkupAPI’s developer surface includes authentication, pricing, getting-started guide, documentation, API reference, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.8/100 thin ▬ flat Agent 44/100 agent ready Heartbeat 88/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

2 APIs 1 MCP Servers

Company Outreach Artificial Intelligence Automation

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 35.8/100 · thin

Contract Quality 6.8 / 19

Developer Ergonomics 3.9 / 15

Access Clarity 9.1 / 15

Operational Transparency 0.8 / 10

Contract Governance 2.0 / 9

Discoverability 4.4 / 8

Regulatory Posture 2.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 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

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Agent Skills +5 pts — skills artifact present, graded by who authored it

4 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 36.4 — up to +15.9 composite points
Developer Ergonomics scores 26.2 — up to +14.8 composite points
Operational Transparency scores 7.9 — up to +12.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/linkupapi/apis.yml: open an issue on github.com/api-evangelist/linkupapi to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 2

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

LinkupAPI API

API for automating LinkedIn, email, and WhatsApp communications as described on the documentation site.

LinkupAPI API

LinkupAPI API as documented publicly: 55 operations. Contract generated from the documentation by API Evangelist (2026-10-18); not the provider's own document.

MCP Servers 1

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

LinkupAPI MCP Server

Remote MCP server at mcp.linkupapi.com.

MCP SERVER

LinkupAPI pricing

Prices published by LinkupAPI, read 2026-10-18 from linkupapi.com/pricing.

Plan	Price
Up to 10	$55 a month, flat
11 to 50	$5.50/account/month
Unlimited	$3,000/month, flat

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Linkupapi Plans Pricing

3 plans

PLANS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Linkupapi Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Linkupapi Context

35 classes · 18 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

LinkupAPI API Rules

46 rules · 44 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

PostV1MessagesSendMessageRequest

4 properties

JSON SCHEMA

PostV1NetworkAcceptInvitationRequest

3 properties

JSON SCHEMA

PostV1NetworkAcceptInvitationResponse

3 properties

JSON SCHEMA

PostV1ProfileSearchRequest

5 properties

JSON SCHEMA

PostV1WebhooksAccountsRequest

4 properties

JSON SCHEMA

PostV2CategoryRequest

3 properties

JSON SCHEMA

Security Posture 2

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

Linkupapi Authentication

1 scheme

SECURITY

Linkupapi Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: linkupapi
name: LinkupAPI
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  probe_state: unreadable
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://media.linkupapi.com/hero/LinkupAPI_Hero_v2_poster.jpg
description: LinkupAPI provides an outreach API enabling AI agents and software to automate LinkedIn, email, and WhatsApp
  communications. It offers endpoints for prospect search, profile retrieval, email verification, messaging, and engagement
  tracking, supporting use cases like lead generation, candidate sourcing, and CRM enrichment. The platform includes a Managed
  Cloud Platform (MCP) for seamless integration with Claude, Cursor, and other AI tools, delivering real-time data and interaction
  capabilities across B2B channels.
url: https://raw.githubusercontent.com/api-evangelist/linkupapi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-18 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-18'
modified: '2026-10-18'
tags:
- Company
- Outreach
- Artificial Intelligence
- Automation
tags_raw:
- Company
- API
- Outreach
- AI
- Automation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Login
  url: https://app.linkupapi.com/signin
- type: Plans
  url: plans/linkupapi-plans-pricing.yml
- type: Spectral
  url: rules/linkupapi-rules.yml
- type: JSONLD
  url: json-ld/linkupapi-context.jsonld
- type: Vocabulary
  url: vocabulary/linkupapi-vocabulary.yml
- type: Webhooks
  url: asyncapi/linkupapi-webhooks.yml
- type: DataModel
  url: data-model/linkupapi-data-model.yml
- type: Authentication
  url: authentication/linkupapi-authentication.yml
- type: ErrorCatalog
  url: errors/linkupapi-problem-types.yml
- type: Conformance
  url: conformance/linkupapi-conformance.yml
- type: LLMsTxt
  url: llms/linkupapi-llms.txt
- type: AgentCard
  url: a2a/linkupapi-a2a.yml
- type: MCPServer
  url: mcp/linkupapi-mcp.yml
- type: WellKnown
  url: well-known/linkupapi-well-known.yml
- type: Hosts
  url: hosts/linkupapi-hosts.yml
- type: Vendors
  url: vendors/linkupapi-vendors.yml
- type: TermsOfService
  url: https://linkupapi.com/legal/legal-notice
- type: PrivacyPolicy
  url: https://linkupapi.com/legal/privacy-policy
- type: Pricing
  url: https://linkupapi.com/pricing
- type: GettingStarted
  url: https://docs.linkupapi.com/api-reference/v2/mcp-setup
- type: Documentation
  url: https://docs.linkupapi.com/
- type: APIReference
  url: https://docs.linkupapi.com/llms.txt
- type: DomainSecurity
  url: security/linkupapi-domain-security.yml
- type: Website
  url: https://linkupapi.com/
apis:
- name: LinkupAPI API
  description: API for automating LinkedIn, email, and WhatsApp communications as described on the documentation site.
  humanURL: https://docs.linkupapi.com/
  aid: linkupapi:linkupapi-api-2
- aid: linkupapi:linkupapi-api
  name: LinkupAPI API
  description: 'LinkupAPI API as documented publicly: 55 operations. Contract generated from the documentation by API Evangelist
    (2026-10-18);

    not the provider''s own document.'
  humanURL: https://docs.linkupapi.com/api-reference/v2/introduction
  baseURL: https://api.linkupapi.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/linkupapi-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/linkupapi-post-v1-webhooks-accounts-request-schema.json
  - type: JSONSchema
    url: json-schema/linkupapi-post-v1-network-accept-invitation-request-schema.json
  - type: JSONSchema
    url: json-schema/linkupapi-post-v1-network-accept-invitation-response-schema.json
  - type: JSONSchema
    url: json-schema/linkupapi-post-v2-category-request-schema.json
  - type: JSONSchema
    url: json-schema/linkupapi-post-v1-profile-search-request-schema.json
  - type: JSONSchema
    url: json-schema/linkupapi-post-v1-messages-send-message-request-schema.json
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The only OpenAPI document found (https://docs.linkupapi.com/openapi.json) describes a LinkedIn API, not LinkupAPI,
    so no valid contract belongs to this provider.
  evidence:
  - url: https://docs.linkupapi.com/openapi.json
    status: 200
  checked: '2026-10-18'
x-enrichment:
  date: '2026-10-18'
  status: enriched
  artifacts_added: 33
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

LinkupAPI — frequently asked questions

Does LinkupAPI have an API?

Yes. APIs.io lists 2 APIs from LinkupAPI, including LinkupAPI API and LinkupAPI API.

Is there an OpenAPI specification for the LinkupAPI?

Yes. APIs.io indexes 1 OpenAPI specification for LinkupAPI, each linked for download from this page.

How do I authenticate with the LinkupAPI?

LinkupAPI documents its authentication (1 scheme). The details are profiled on APIs.io as Linkupapi Authentication.

How much does the LinkupAPI cost?

LinkupAPI publishes its prices; its Up to 10 plan is $55 a month, flat as of 2026-10-18. APIs.io lists 3 pricing plans for LinkupAPI, with each plan's price, limits and inclusions under Pricing on this page.

Does LinkupAPI have an MCP server?

Yes. APIs.io lists 1 MCP server for LinkupAPI: Remote MCP server at mcp.linkupapi.com.

Is the LinkupAPI ready for AI agents?

LinkupAPI has a Kin Score of 35.8 out of 100 (thin) and an Agent Readiness score of 44.0 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

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MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

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get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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