Seamless.AI

Seamless.AI is a B2B sales intelligence platform that provides real-time contact and company data to help sales teams find and connect with their ideal customers. The platform uses artificial intelligence to continuously verify and update contact information including emails, direct dials and mobile numbers. Its Public API v1 is a three-hop enrichment pipeline — search, research, then collect by polling or webhook — secured with an API key in a Token header or OAuth 2.0, and metered in research credits rather than API calls. Alongside the nine-operation REST API, Seamless.AI operates a hosted Model Context Protocol server exposing 54 tools across search, research, lists, saved searches, campaigns, templates, email, calls, tasks and activity, secured with OAuth 2.1, dynamic client registration and published per-tool risk tiers.

Seamless.AI publishes 2 APIs on the APIs.io network: Public API and MCP Server. Tagged areas include B2B, Contact Data, Sales Intelligence, Prospecting, and Lead Generation.

The Seamless.AI catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.

Seamless.AI’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 49 more developer resources.

🌐 Visit website 📡 Source on GitHub

69.5/100 exemplar ▬ flat Agent 56/100 agent ready Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreemiumFree trial

2 APIs 1 MCP Servers

B2B Contact Data Sales Intelligence Prospecting Lead Generation CRM Enrichment Data Enrichment MCP Agents Sales Automation

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 69.5/100 · exemplar

Contract Quality 17.1 / 25

Developer Ergonomics 13.8 / 20

Access Clarity 20.0 / 20

Operational Transparency 4.4 / 13

Contract Governance 5.5 / 12

Discoverability 8.7 / 10

Agent readiness — 56/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 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 8 / 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/seamless-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 2

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

Seamless.AI Public API

The Seamless.AI Public API v1 — nine operations covering contact and company search, asynchronous enrichment (research), result polling, org-data retrieval and the OAuth token e...

Seamless.AI MCP Server

Hosted Model Context Protocol server exposing 54 tools across 11 domains — search, research, user, lists, saved searches, campaigns, templates, email, calls, tasks and activity ...

MCP Servers 1

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

Rate Limits 1

Documented rate limits and quota policies.

Seamless Ai Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

JSON Schema 2

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

Examples 9

Example request and response payloads for these APIs.

Scroll for all 9

Scopes 1

OAuth scopes governing access to this provider's APIs.

Seamless Ai Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 4

Reference material describing how the API behaves

Documentation

APIReference

JSONSchema

JSONSchema

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

LlmsText

AgenticAccess

WellKnown

Design & Contract 11

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

JSONStructure

JSONStructure

JSONLDContext

SpectralRuleset

Vocabulary

Scroll for all 11

Build 7

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

Examples

Examples

Examples

PostmanCollection

PostmanCollection

PostmanCollection

PostmanCollection

Scroll for all 7

Access & Security 5

Authentication, authorization, and security posture

Authentication

OAuthScopes

DomainSecurity

TrustCenter

Compliance

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 11

Properties that don't map to a standard resource type

Overview

Glossary

Announcement

AgentCard

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Scroll for all 11

Source (apis.yml)

aid: seamless-ai
url: https://raw.githubusercontent.com/api-evangelist/seamless-ai/refs/heads/main/apis.yml
name: Seamless.AI
type: Index
specificationVersion: '0.23'
description: Seamless.AI is a B2B sales intelligence platform that provides real-time contact and company data to help sales
  teams find and connect with their ideal customers. The platform uses artificial intelligence to continuously verify and
  update contact information including emails, direct dials and mobile numbers. Its Public API v1 is a three-hop enrichment
  pipeline — search, research, then collect by polling or webhook — secured with an API key in a Token header or OAuth 2.0,
  and metered in research credits rather than API calls. Alongside the nine-operation REST API, Seamless.AI operates a hosted
  Model Context Protocol server exposing 54 tools across search, research, lists, saved searches, campaigns, templates, email,
  calls, tasks and activity, secured with OAuth 2.1, dynamic client registration and published per-tool risk tiers.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/seamless-ai.png
access: 3rd-Party
position: Consuming
created: '2026-05-02'
modified: '2026-08-14'
tags:
- B2B
- Contact Data
- Sales Intelligence
- Prospecting
- Lead Generation
- CRM Enrichment
- Data Enrichment
- MCP
- Agents
- Sales Automation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
accessModel:
  pricing: freemium
  onboarding: sales-assisted
  trial: true
  try_now: false
  public: false
  label: Freemium platform · API gated behind a Public API license
  confidence: high
  source:
  - plans
  - authentication
  - https://seamless.ai/pricing
  - https://docs.seamless.ai/api-http-status-codes
  generated: '2026-08-14'
  method: searched
  note: 'The platform has a self-serve free tier, but the API itself is not self-serve: an account without an active Public
    API license receives HTTP 422 missingLicense, and the paid tiers are quoted by sales rather than priced on the page.'
apis:
- aid: seamless-ai:seamless-ai-public-api
  name: Seamless.AI Public API
  description: The Seamless.AI Public API v1 — nine operations covering contact and company search, asynchronous enrichment
    (research), result polling, org-data retrieval and the OAuth token exchange. Search and org-data reads are free; only
    the research operations spend credits.
  humanURL: https://docs.seamless.ai/
  baseURL: https://api.seamless.ai/api/client/v1
  tags:
  - Contacts
  - Companies
  - Search
  - Enrichment
  - Job Changes
  properties:
  - type: OpenAPI
    url: openapi/_original/seamless-ai-public-api-openapi-original.json
  - type: OpenAPI
    name: Contact Search
    url: openapi/seamless-ai-contact-search-api-openapi.yml
  - type: OpenAPI
    name: Company Search
    url: openapi/seamless-ai-company-search-api-openapi.yml
  - type: OpenAPI
    name: Contact Research
    url: openapi/seamless-ai-contact-research-api-openapi.yml
  - type: OpenAPI
    name: Company Research
    url: openapi/seamless-ai-company-research-api-openapi.yml
  - type: OpenAPI
    name: Org Contacts
    url: openapi/seamless-ai-org-contacts-api-openapi.yml
  - type: OpenAPI
    name: Org Companies
    url: openapi/seamless-ai-org-companies-api-openapi.yml
  - type: OpenAPI
    name: OAuth
    url: openapi/seamless-ai-oauth-api-openapi.yml
  - type: Documentation
    url: https://docs.seamless.ai/
  - type: APIReference
    url: https://docs.seamless.ai/searchcontacts
  - type: GettingStarted
    url: https://docs.seamless.ai/authenticate-and-make-your-first-request
- aid: seamless-ai:seamless-ai-mcp-server
  name: Seamless.AI MCP Server
  description: Hosted Model Context Protocol server exposing 54 tools across 11 domains — search, research, user, lists, saved
    searches, campaigns, templates, email, calls, tasks and activity — plus seven read-only seamless:// resources. Secured
    with OAuth 2.1 (PKCE S256, dynamic client registration, scope mcp.all). Covers Connect products the REST API does not
    expose at all.
  humanURL: https://docs.seamless.ai/mcp-docs
  baseURL: https://mcp.seamless.ai
  tags:
  - MCP
  - Agents
  - Sales Automation
  properties:
  - type: MCPServer
    url: mcp/seamless-ai-mcp.yml
  - type: ToolCrosswalk
    url: mcp/seamless-ai-tool-crosswalk.yml
  - type: OpenAPI
    url: openapi/_original/seamless-ai-mcp-server-openapi-original.yaml
  - type: Documentation
    url: https://docs.seamless.ai/mcp-docs
  - type: GettingStarted
    url: https://docs.seamless.ai/mcp/quickstart
common:
- name: Website
  url: https://seamless.ai
  type: Website
- name: Developer Portal
  url: https://docs.seamless.ai/
  type: DeveloperPortal
- name: API Documentation
  url: https://docs.seamless.ai/
  type: Documentation
- name: API Reference
  url: https://docs.seamless.ai/searchcontacts
  type: APIReference
- name: Getting Started
  url: https://docs.seamless.ai/authenticate-and-make-your-first-request
  type: GettingStarted
- name: API Overview
  url: https://seamless.ai/products/api
  type: Overview
- name: Support
  url: https://seamless.ai/customers/education
  type: Support
- name: Blog
  url: https://seamless.ai/customers/blog
  type: Blog
- name: Pricing
  url: https://seamless.ai/pricing
  type: Pricing
- name: Sign Up
  url: https://login.seamless.ai/register
  type: SignUp
- name: Login
  url: https://login.seamless.ai/login
  type: Login
- name: Terms of Use
  url: https://seamless.ai/policies/terms-of-use
  type: TermsOfService
- name: Privacy Policy
  url: https://seamless.ai/policies/privacy-policy
  type: PrivacyPolicy
- name: GitHub Organization
  url: https://github.com/SeamlessAI
  type: GitHubOrganization
- name: API Terms Glossary
  url: https://seamless.ai/customers/education/articles/api-terms-glossary
  type: Glossary
- name: API Launch Announcement
  url: https://seamless.ai/news/releases/api
  type: Announcement
- type: LinkedIn
  url: https://www.linkedin.com/company/seamlessai
- name: A2A Agent Card
  url: a2a/seamless-ai-a2a.yml
  type: AgentCard
- name: Agent Skills
  url: skills/_index.yml
  type: AgentSkill
- name: llms.txt
  url: llms/seamless-ai-llms.txt
  type: LLMsTxt
- type: LlmsText
  url: https://docs.seamless.ai/llms.txt
- type: AgenticAccess
  url: agentic-access/seamless-ai-agentic-access.yml
- name: Well-Known Discovery
  url: well-known/seamless-ai-well-known.yml
  type: WellKnown
- type: Authentication
  url: authentication/seamless-ai-authentication.yml
- type: OAuthScopes
  url: scopes/seamless-ai-scopes.yml
- type: Conventions
  url: conventions/seamless-ai-conventions.yml
- type: ErrorCatalog
  url: errors/seamless-ai-problem-types.yml
- type: RateLimits
  url: rate-limits/seamless-ai-rate-limits.yml
- type: Plans
  url: plans/seamless-ai-plans-pricing.yml
- type: Lifecycle
  url: lifecycle/seamless-ai-lifecycle.yml
- type: Conformance
  url: conformance/seamless-ai-conformance.yml
- type: DataModel
  url: data-model/seamless-ai-data-model.yml
- type: Packages
  url: packages/seamless-ai-packages.yml
- type: Webhooks
  url: asyncapi/seamless-ai-webhooks.yml
- type: DomainSecurity
  url: security/seamless-ai-domain-security.yml
- type: TrustCenter
  url: security/seamless-ai-trust-center.yml
- name: Trust Center
  url: https://trust.seamless.ai/
  type: Compliance
- name: Contact Search Overlay
  url: overlays/seamless-ai-contact-search-overlay.yaml
  type: Overlay
- name: Company Search Overlay
  url: overlays/seamless-ai-company-search-overlay.yaml
  type: Overlay
- name: Contact Research Overlay
  url: overlays/seamless-ai-contact-research-overlay.yaml
  type: Overlay
- name: Company Research Overlay
  url: overlays/seamless-ai-company-research-overlay.yaml
  type: Overlay
- name: Org Contacts Overlay
  url: overlays/seamless-ai-org-contacts-overlay.yaml
  type: Overlay
- name: Org Companies Overlay
  url: overlays/seamless-ai-org-companies-overlay.yaml
  type: Overlay
- name: OAuth Overlay
  url: overlays/seamless-ai-oauth-overlay.yaml
  type: Overlay
- url: json-schema/seamless-ai-contact-schema.json
  type: JSONSchema
- url: json-schema/seamless-ai-company-schema.json
  type: JSONSchema
- url: json-structure/seamless-ai-contact-structure.json
  type: JSONStructure
- url: json-structure/seamless-ai-company-structure.json
  type: JSONStructure
- url: json-ld/seamless-ai-context.jsonld
  type: JSONLDContext
- url: examples/seamless-ai-search-contacts-example.json
  type: Examples
- url: examples/seamless-ai-research-contacts-example.json
  type: Examples
- url: examples/seamless-ai-poll-contacts-research-results-example.json
  type: Examples
- url: rules/seamless-ai-rules.yml
  type: SpectralRuleset
- url: vocabulary/seamless-ai-vocabulary.yml
  type: Vocabulary
- name: Contact Search Postman Collection
  url: collections/seamless-ai-contact-search-api.postman_collection.json
  type: PostmanCollection
- name: Company Search Postman Collection
  url: collections/seamless-ai-company-search-api.postman_collection.json
  type: PostmanCollection
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 24
  pass: local-v1

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Seamless.AI

APIs 2

MCP Servers 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Event Specifications 1

Semantic Vocabularies 1

Spectral Rules 2

JSON Schema 2

JSON Structure 2

Examples 9

Security Posture 3

Scopes 1

Agentic Access 1

Get Started 4

Documentation 4

Agent Surfaces 5

Design & Contract 11

Build 7

Access & Security 5

Operate 2

Commercial 4

Company 3

Other 11

Source (apis.yml)

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