How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Seamless.AI

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 exchange. Search and org-data reads are free; only the research operations spend credits.

Documentation Provider Profile APIs.io OpenAPI GitHub

Seamless.AI Public API is one of 2 APIs that Seamless.AI publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Contacts, Companies, Search, Enrichment, and Job Changes. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and a getting-started guide.

This API exposes 9 operations across 9 paths, organized into 7 resource areas. It is described by OpenAPI 3.0.0, at version 1.0.0.

Requests are made against a single base URL, https://api.seamless.ai/api/client/v1.

9 operations 9 paths 0 schemas 4 GET5 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.0
API Version
1.0.0
Base URL
https://api.seamless.ai/api/client/v1
Authentication
OAuth 2.0, API Key, API Key
Terms of Service
View terms
Resource Areas
7

Authentication & Security 3

Seamless.AI Public API declares 3 security schemes for authenticating requests. It supports OAuth 2.0 (OAuth2) using the authorizationCode flow. An API key is passed in the header as Token (ApiKeyAuth). An API key is passed in the header as x-seamless-webhook-secret (webhookSecret). By default, every request must be authenticated.

  • ApiKeyAuth — API key passed via the Token header.
  • webhookSecret — Webhook secret that you can use to validate the request is originated by Seamless

Paths & Operations 9

Across 9 paths, the API surfaces 9 operations — 4 GET, 5 POST. They span 7 resource areas: Org Companies, Org Contacts, OAuth, Company Search, Contact Search, Company Research, Contact Research. Each is listed below with its method, path, parameters, and response codes.

Org Companies 1
GET
/companies
Get Org Companies
getCompanies 4 params → 200401422500
Org Contacts 1
GET
/contacts
Get Org Contacts
getContacts 4 params → 200401422500
OAuth 1
POST
/oauth/accessToken
Get an access token
getAccessToken body → 200401422500
Company Search 1
POST
/search/companies
Search companies
searchCompanies body → 200401422500
Contact Search 1
POST
/search/contacts
Search contacts
searchContacts body → 200401422500
Company Research 2
POST
/companies/research
Research companies
researchCompanies body → 202401422500
GET
/companies/research/poll
Poll Company Research
pollCompanyResearchResults 1 param → 200401422500
Contact Research 2
POST
/contacts/research
Research contacts
researchContacts body → 202401422500
GET
/contacts/research/poll
Poll Contact Research
pollContactsResearchResults 1 param → 200401422500

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

seamless-ai-public-api-openapi-original.json Raw ↑

Other APIs Seamless.AI publishes across the network.

Seamless.AI MCP Server
AE Profile APIs.io
#Contacts#Companies#Search#Enrichment#Job Changes
← Back to S APIs
API Details
ID
seamless-ai:seamless-ai-public-api
Base URL
https://api.seamless.ai/api/client/v1
Docs
https://docs.seamless.ai/
Provider
Seamless.AI
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=seamless-ai-public-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/seamless-ai-public-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Seamless.AI Public API, 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.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.