FullEnrich

FullEnrich is a B2B contact enrichment platform that finds verified business emails, personal emails and mobile phone numbers by running a waterfall across 25+ data vendors, billing credits only when data is found and passes verification. Its v2 REST API covers four surfaces — asynchronous bulk contact enrichment, bulk reverse email lookup, and synchronous people/company search and lookup across 800M people and 50M companies. Alongside the REST API it operates a first-party remote MCP server with 13 tools, publishes nine MIT-licensed Agent Skills, serves an A2A agent card, and maintains a machine-readable pricing document written for AI agents to read.

FullEnrich publishes 5 API contracts indexed on the APIs.io network, including Account API, Company API, Contact API, and 2 more. Tagged areas include B2B Data, Contact Enrichment, Email Finder, Phone Finder, and Waterfall Enrichment.

The FullEnrich catalog on APIs.io includes 1 event-driven AsyncAPI specification.

FullEnrich’s developer surface includes authentication, sandbox, documentation, API reference, getting-started guide, support, engineering blog, and 39 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

60.7/100 strong ▬ flat Agent 60/100 agent ready Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

1 published contract 1 MCP Servers

B2B Data Contact Enrichment Email Finder Phone FinderWaterfall EnrichmentSales Intelligence People Search Company SearchReverse Email LookupAgent Ready A2A Data Enrichment

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Customer Relationship Management

BC-420

Contact

POST /contact/enrich/bulk POST /contact/reverse/email/bulk

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 60.7/100 · strong

Contract Quality 11.1 / 19

Developer Ergonomics 6.6 / 15

Access Clarity 11.8 / 15

Operational Transparency 5.9 / 10

Contract Governance 1.6 / 9

Discoverability 5.6 / 8

Regulatory Posture 6.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 60/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

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/.

Show this score on your site.

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<a href="https://apis.io/providers/fullenrich/"><img src="https://apis.io/badge/fullenrich/card.svg" alt="FullEnrich on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

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 github.com/api-evangelist/fullenrich: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	undeclared	-	1	2

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 5

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

FullEnrich Account API

Check the workspace credit balance before spending, and validate that an API key is active. Both operations are free.

FullEnrich MCP Server

First-party remote Model Context Protocol server exposing 13 tools for B2B contact and company search, waterfall enrichment, and CSV/JSON export. Streamable HTTP transport with ...

FullEnrich Company API

The Company API from FullEnrich — 2 operation(s) for company.

FullEnrich Contact API

The Contact API from FullEnrich — 4 operation(s) for contact.

FullEnrich People API

The People API from FullEnrich — 2 operation(s) for people.

Open Collections 4

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

FullEnrich Account API

OPEN COLLECTION

FullEnrich Account Contact Enrichment API

OPEN COLLECTION

FullEnrich Account Reverse Email Lookup API

OPEN COLLECTION

FullEnrich API

OPEN COLLECTION

MCP Servers 1

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

FullEnrich MCP Server

FullEnrich operates a first-party remote MCP server that exposes B2B contact and company search, waterfall enrichment, and CSV/JSON export to MCP-capable agents. Transport is St...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Fullenrich Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Fullenrich Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Fullenrich Finops

FINOPS

Event Specifications 1

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

Fullenrich Webhooks

ASYNCAPI

OpenAPI Overlays 5

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Fullenrich Account Api Overlay

4 actions · update · fullenrich-account-api-openapi.yml

DERIVED

Fullenrich Contact Enrichment Api Overlay

4 actions · update · fullenrich-contact-enrichment-api-openapi.yml

DERIVED

Fullenrich Lookup Api Overlay

4 actions · update · fullenrich-lookup-api-openapi.yml

DERIVED

Fullenrich Reverse Email Lookup Api Overlay

4 actions · update · fullenrich-reverse-email-lookup-api-openapi.yml

DERIVED

Fullenrich Search Api Overlay

4 actions · update · fullenrich-search-api-openapi.yml

DERIVED

Security Posture 4

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

Fullenrich Authentication

http/oauth2 · 3 schemes

SECURITY

Fullenrich Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Fullenrich Vulnerability Disclosure

contact published

SECURITY

Fullenrich Trust Center

SOC 2 Type II, GDPR, CCPA

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Fullenrich Scopes

14 scopes · authorizationCode/clientCredentials

14 scopes

SCOPES

Agentic Access 1

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

Fullenrich Agentic Access

10 operations · 4 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Documentation 3

Reference material describing how the API behaves

OpenAPI

OpenAPI

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgentSkill

LLMsTxt

WellKnown

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Webhooks

Lifecycle

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 7

Authentication, authorization, and security posture

Authentication

OAuthScopes

Compliance

TrustCenter

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

StatusPage

RateLimits

Support

Contact

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Other 6

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

Overlay

AgentCard

Source (apis.yml)

aid: fullenrich
url: https://raw.githubusercontent.com/api-evangelist/fullenrich/refs/heads/main/apis.yml
name: FullEnrich
kind: company
description: FullEnrich is a B2B contact enrichment platform that finds verified business emails, personal emails and mobile
  phone numbers by running a waterfall across 25+ data vendors, billing credits only when data is found and passes verification.
  Its v2 REST API covers four surfaces — asynchronous bulk contact enrichment, bulk reverse email lookup, and synchronous
  people/company search and lookup across 800M people and 50M companies. Alongside the REST API it operates a first-party
  remote MCP server with 13 tools, publishes nine MIT-licensed Agent Skills, serves an A2A agent card, and maintains a machine-readable
  pricing document written for AI agents to read.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-08-14'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fullenrich.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: vercel
tags:
- B2B Data
- Contact Enrichment
- Email Finder
- Phone Finder
- Waterfall Enrichment
- Sales Intelligence
- People Search
- Company Search
- Reverse Email Lookup
- Agent Ready
- A2A
- Data Enrichment
created: '2026-07-01'
modified: '2026-08-14'
specificationVersion: '0.23'
apis:
- aid: fullenrich:fullenrich-account-api
  name: FullEnrich Account API
  description: Check the workspace credit balance before spending, and validate that an API key is active. Both operations
    are free.
  humanURL: https://docs.fullenrich.com/api/v2/account/credits/get
  baseURL: https://app.fullenrich.com/api/v2
  tags:
  - Account
  - Credit
  - Billing
  tags_raw:
  - Account
  - Credits
  - Billing
  properties:
  - type: OpenAPI
    url: openapi/fullenrich-account-api-openapi.yml
  - type: Overlay
    url: overlays/fullenrich-account-api-overlay.yaml
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/account/credits/get
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/account/keys/verify/get
  - type: PostmanCollection
    url: collections/fullenrich-account-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-account-api.opencollection.json
- aid: fullenrich:fullenrich-mcp-server
  name: FullEnrich MCP Server
  description: First-party remote Model Context Protocol server exposing 13 tools for B2B contact and company search, waterfall
    enrichment, and CSV/JSON export. Streamable HTTP transport with browser OAuth against a FullEnrich account.
  humanURL: https://help.fullenrich.com/en/articles/14190120-mcp-server
  baseURL: https://mcp.fullenrich.com/mcp
  tags:
  - MCP
  - Agent Ready
  - Contact Enrichment
  properties:
  - type: MCPServer
    url: mcp/fullenrich-mcp.yml
  - type: ToolCrosswalk
    url: mcp/fullenrich-tool-crosswalk.yml
  - type: Documentation
    url: mcp/fullenrich-mcp-documentation.md
  - type: Documentation
    url: https://help.fullenrich.com/en/articles/14190120-mcp-server
- aid: fullenrich:fullenrich-company-api
  name: FullEnrich Company API
  description: The Company API from FullEnrich — 2 operation(s) for company.
  humanURL: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  baseURL: https://app.fullenrich.com/api/v2
  tags:
  - Company
  properties:
  - type: OpenAPI
    url: openapi/fullenrich-company-api-openapi.yml
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: PostmanCollection
    url: collections/fullenrich-contact-enrichment-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-contact-enrichment-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/get
  - type: PostmanCollection
    url: collections/fullenrich-reverse-email-lookup-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-reverse-email-lookup-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/intro-search
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/people/search/post
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/filtering-logic-explained
  - type: Vocabulary
    url: https://docs.fullenrich.com/api/v2/general/enums
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/people/lookup/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/company/lookup/post
- aid: fullenrich:fullenrich-contact-api
  name: FullEnrich Contact API
  description: The Contact API from FullEnrich — 4 operation(s) for contact.
  humanURL: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  baseURL: https://app.fullenrich.com/api/v2
  tags:
  - Contact
  properties:
  - type: OpenAPI
    url: openapi/fullenrich-contact-api-openapi.yml
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: PostmanCollection
    url: collections/fullenrich-contact-enrichment-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-contact-enrichment-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/get
  - type: PostmanCollection
    url: collections/fullenrich-reverse-email-lookup-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-reverse-email-lookup-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/intro-search
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/people/search/post
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/filtering-logic-explained
  - type: Vocabulary
    url: https://docs.fullenrich.com/api/v2/general/enums
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/people/lookup/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/company/lookup/post
- aid: fullenrich:fullenrich-people-api
  name: FullEnrich People API
  description: The People API from FullEnrich — 2 operation(s) for people.
  humanURL: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  baseURL: https://app.fullenrich.com/api/v2
  tags:
  - People
  properties:
  - type: OpenAPI
    url: openapi/fullenrich-people-api-openapi.yml
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/enrich/bulk/post
  - type: PostmanCollection
    url: collections/fullenrich-contact-enrichment-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-contact-enrichment-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/contact/reverse/email/bulk/get
  - type: PostmanCollection
    url: collections/fullenrich-reverse-email-lookup-api.postman_collection.json
  - type: OpenCollection
    url: collections/fullenrich-reverse-email-lookup-api.opencollection.json
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/intro-search
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/people/search/post
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/general/filtering-logic-explained
  - type: Vocabulary
    url: https://docs.fullenrich.com/api/v2/general/enums
  - type: Documentation
    url: https://docs.fullenrich.com/api/v2/people/lookup/post
  - type: APIReference
    url: https://docs.fullenrich.com/api/v2/company/lookup/post
common:
- type: CapabilityMap
  url: capabilities/fullenrich-capability-edges.yml
  name: FullEnrich Business Capability Map
- type: Overlay
  url: overlays/fullenrich-contact-enrichment-api-overlay.yaml
- type: Overlay
  url: overlays/fullenrich-reverse-email-lookup-api-overlay.yaml
- type: Overlay
  url: overlays/fullenrich-search-api-overlay.yaml
- type: Overlay
  url: overlays/fullenrich-lookup-api-overlay.yaml
- type: OpenAPI
  url: openapi/_original/fullenrich-openapi.yml
- type: MCPServer
  url: mcp/fullenrich-mcp.yml
- type: ToolCrosswalk
  url: mcp/fullenrich-tool-crosswalk.yml
- type: AgentCard
  url: a2a/fullenrich-a2a.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/fullenrich-llms.txt
- type: WellKnown
  url: well-known/fullenrich-well-known.yml
- type: Authentication
  url: authentication/fullenrich-authentication.yml
- type: OAuthScopes
  url: scopes/fullenrich-scopes.yml
- type: Conventions
  url: conventions/fullenrich-conventions.yml
- type: ErrorCatalog
  url: errors/fullenrich-problem-types.yml
- type: DataModel
  url: data-model/fullenrich-data-model.yml
- type: Webhooks
  url: asyncapi/fullenrich-webhooks.yml
- type: Lifecycle
  url: lifecycle/fullenrich-lifecycle.yml
- type: StatusPage
  url: https://status.fullenrich.com
- type: Sandbox
  url: sandbox/fullenrich-sandbox.yml
- type: Packages
  url: packages/fullenrich-packages.yml
- type: Conformance
  url: conformance/fullenrich-conformance.yml
- type: Compliance
  url: https://fullenrich.com/trust
- type: TrustCenter
  url: security/fullenrich-trust-center.yml
- type: Security
  url: https://github.com/FullEnrich/fullenrich-skills/blob/HEAD/SECURITY.md
- type: VulnerabilityDisclosure
  url: security/fullenrich-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/fullenrich-domain-security.yml
- type: AgenticAccess
  url: agentic-access/fullenrich-agentic-access.yml
- type: Plans
  url: plans/fullenrich-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fullenrich-rate-limits.yml
- type: FinOps
  url: finops/fullenrich-finops.yml
- type: DeveloperPortal
  url: https://docs.fullenrich.com
- type: Documentation
  url: https://docs.fullenrich.com
- type: APIReference
  url: https://docs.fullenrich.com/api/v2/general/introduction
- type: GettingStarted
  url: https://docs.fullenrich.com/api/v2/implement-in-product/getting-started
- type: Support
  url: https://help.fullenrich.com
- type: Blog
  url: https://fullenrich.com/blog
- type: GitHubOrganization
  url: https://github.com/FullEnrich
- type: LinkedIn
  url: https://www.linkedin.com/company/fullenrich
- type: Website
  url: https://fullenrich.com
- type: Pricing
  url: https://fullenrich.com/pricing
- type: SignUp
  url: https://app.fullenrich.com/app/signUp
- type: TermsOfService
  url: https://fullenrich.com/tos
- type: PrivacyPolicy
  url: https://fullenrich.com/privacy-policy
- type: Contact
  url: mailto:support@fullenrich.com
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 38
  pass: local-v1
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://docs.fullenrich.com/.well-known/agent-card.json
  grade: conformant
  protocol_version: '0.3'
  control: 404

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