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

Indexed Companies API

The Companies API from Indexed — 3 operation(s) for companies.

Indexed Companies API is one of 8 APIs that Indexed publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 6 JSON Schema definitions.

Tagged areas include Companies. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

This API exposes 3 operations across 3 paths, and defines 8 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://indexed.vc/api/v1.

3 operations 3 paths 8 schemas 2 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://indexed.vc/api/v1
Authentication
API Key
License
Proprietary
Resource Areas
1

Authentication & Security 1

Indexed Companies API declares 1 security scheme for authenticating requests. An API key is passed in the header as X-API-Key (ApiKeyAuth). By default, every request must be authenticated.

  • ApiKeyAuth — API key in format idx . Available on every plan; entity detail and reveal spend credits on every plan, while bulk enrichment, webhooks, scheduled exports and l…

Paths & Operations 3

Across 3 paths, the API surfaces 3 operations — 2 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Companies 3
GET
/companies
Search companies
searchCompanies 20 params → 200400401402429
POST
/companies/lookup
Look up up to 100 company domains
lookupCompanyDomains body → 200400401402429
GET
/companies/{slug}
Get company by slug
getCompany 2 params → 200400401404503

Schemas 8

The contract defines 8 schemas that model the data the API accepts and returns. The most detailed are CompanyProfile (23 properties), CompanyCard (14 properties), SearchPageMeta (13 properties), ApiError (8 properties). Each schema is shown below with its type and property counts.

CompanyProfile
object
Shape varies by depth parameter (slim/standard/full)
23 properties 3 required
CompanyDomainLookupSummary
object
5 properties 5 required
DomainMatch
object
3 properties 3 required
CompanyCard
object
14 properties 4 required
SearchPageMeta
object
13 properties 7 required
CompanyRelationship
object
4 properties
ApiError
object
8 properties 2 required
CompanyDomainLookupItem

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

indexed-vc-companies-api-openapi.yml Raw ↑

Other APIs Indexed publishes across the network.

Indexed Enrich API
Indexed Industries API
Indexed Investors API
Indexed Reveal API
Indexed Scheduled Exports API
Indexed Usage API
Indexed Webhooks API
Where this information came from

This is an independent, third-party profile of Indexed Companies 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.