DeepInquiry Verified Facts API (Machine Accountability Corp)

DeepInquiry Verified Facts API (Machine Accountability Corp) provides a curated, verifiable fact database accessible via a RESTful API. Each fact is cross‑checked against multiple sources, cited, dated, and cryptographically signed, offering users trustworthy data for applications ranging from research to product development. The service includes tiered pricing, API key authentication, and detailed usage limits, ensuring both free access for low‑volume needs and scalable plans for enterprise integration.

DeepInquiry Verified Facts API (Machine Accountability Corp) publishes 2 API contracts indexed on the APIs.io network: Facts API and Search API. Tagged areas include Company, Facts, Verification, and Data.

The DeepInquiry Verified Facts API (Machine Accountability Corp) catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

DeepInquiry Verified Facts API (Machine Accountability Corp)’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.0/100 developing ▼ -7.9 Agent 39/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Company Facts Verification Data

Kin Score

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

Composite quality — 47.0/100 · developing

Contract Quality 14.2 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 9.2 / 17

Operational Transparency 3.5 / 11

Contract Governance 2.2 / 10

Discoverability 5.7 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 39/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Agent Skills +5 pts — skills artifact present, graded by who authored it
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

2 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 26.2 — up to +14.8 composite points
Contract Governance scores 22.0 — up to +9.4 composite points
Access Clarity scores 53.9 — up to +9.2 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/deepinquiry/apis.yml: open an issue on github.com/api-evangelist/deepinquiry 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 2

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)

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

DeepInquiry Verified Facts API (Machine Accountability Corp) Facts API

Read-only access to the verified-facts corpus.

DeepInquiry Verified Facts API (Machine Accountability Corp) Search API

Semantic search across the corpus.

MCP Servers 1

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

DeepInquiry Verified Facts API (Machine Accountability Corp) MCP Server

Remote MCP server at www.deepinquiry.ai requiring an API key.

MCP SERVER

DeepInquiry Verified Facts API (Machine Accountability Corp) pricing

Prices published by DeepInquiry Verified Facts API (Machine Accountability Corp). A free plan or tier is listed.

Plan	Price
Free	Free
Starter	$59
Growth	$219
Scale	$719
Enterprise	custom

Plan details, limits and sources →

Rate limits

Free: 30 requests / minute
Starter: 60 requests / minute
Growth: 300 requests / minute

All 4 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Deepinquiry Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Deepinquiry Rate Limits

4 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

DeepInquiry Verified Facts API (Machine Accountability Corp)

SLA

Semantic Vocabularies 1

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

Deepinquiry Context

5 classes · 26 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

DeepInquiry Verified Facts API (Machine Accountability Corp) API Rules

17 rules · 15 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

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.

Deepinquiry Openapi Overlay

0 actions · update

DERIVED

JSON Schema 4

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

FactList

2 properties

JSON SCHEMA

Fact

15 properties

JSON SCHEMA

FactWithClusters

16 properties

JSON SCHEMA

SearchResult

2 properties

JSON SCHEMA

Security Posture 2

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

Deepinquiry Authentication

1 scheme

SECURITY

Deepinquiry Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Deepinquiry Agentic Access

4 operations

4 operations · 0 acting

AGENTIC

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 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: deepinquiry
name: DeepInquiry Verified Facts API (Machine Accountability Corp)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.deepinquiry.ai/opengraph-image?01749e82229af5bc
description: DeepInquiry Verified Facts API (Machine Accountability Corp) provides a curated, verifiable fact database accessible
  via a RESTful API. Each fact is cross‑checked against multiple sources, cited, dated, and cryptographically signed, offering
  users trustworthy data for applications ranging from research to product development. The service includes tiered pricing,
  API key authentication, and detailed usage limits, ensuring both free access for low‑volume needs and scalable plans for
  enterprise integration.
url: https://raw.githubusercontent.com/api-evangelist/deepinquiry/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-18 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-17'
modified: '2026-10-17'
tags:
- Company
- Facts
- Verification
- Data
tags_raw:
- Company
- API
- Facts
- Verification
- Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/deepinquiry-agentic-access.yml
- type: RateLimits
  url: rate-limits/deepinquiry-rate-limits.yml
- type: Plans
  url: plans/deepinquiry-plans-pricing.yml
- type: Spectral
  url: rules/deepinquiry-rules.yml
- type: JSONLD
  url: json-ld/deepinquiry-context.jsonld
- type: Vocabulary
  url: vocabulary/deepinquiry-vocabulary.yml
- type: DataModel
  url: data-model/deepinquiry-data-model.yml
- type: Conventions
  url: conventions/deepinquiry-conventions.yml
- type: Authentication
  url: authentication/deepinquiry-authentication.yml
- type: ErrorCatalog
  url: errors/deepinquiry-problem-types.yml
- type: Conformance
  url: conformance/deepinquiry-conformance.yml
- type: Overlay
  url: overlays/deepinquiry-openapi-overlay.yml
- type: LLMsTxt
  url: llms/deepinquiry-llms.txt
- type: MCPServer
  url: mcp/deepinquiry-mcp.yml
- type: WellKnown
  url: well-known/deepinquiry-well-known.yml
- type: Hosts
  url: hosts/deepinquiry-hosts.yml
- type: Vendors
  url: vendors/deepinquiry-vendors.yml
- type: Login
  url: https://www.deepinquiry.ai/signin
- type: DomainSecurity
  url: security/deepinquiry-domain-security.yml
- type: Website
  url: https://www.deepinquiry.ai/
- type: Documentation
  url: https://www.deepinquiry.ai/docs
- type: APIReference
  url: https://www.deepinquiry.ai/api
- type: GettingStarted
  url: https://www.deepinquiry.ai/signup
- type: Pricing
  url: https://www.deepinquiry.ai/pricing
- type: TermsOfService
  url: https://www.deepinquiry.ai/terms
- type: PrivacyPolicy
  url: https://www.deepinquiry.ai/privacy
apis:
- aid: deepinquiry:deepinquiry-facts-api
  name: DeepInquiry Verified Facts API (Machine Accountability Corp) Facts API
  description: Read-only access to the verified-facts corpus.
  humanURL: https://www.deepinquiry.ai/docs
  baseURL: https://api.deepinquiry.ai/api
  tags:
  - Facts
  properties:
  - type: OpenAPI
    url: openapi/deepinquiry-facts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-list-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-with-clusters-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-search-result-schema.json
- aid: deepinquiry:deepinquiry-search-api
  name: DeepInquiry Verified Facts API (Machine Accountability Corp) Search API
  description: Semantic search across the corpus.
  humanURL: https://www.deepinquiry.ai/docs
  baseURL: https://api.deepinquiry.ai/api
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/deepinquiry-search-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-list-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-fact-with-clusters-schema.json
  - type: JSONSchema
    url: json-schema/deepinquiry-search-result-schema.json
x-submission-notes: apis.json, openapi.json, llms.txt all live
x-submission-probe: root/docs 200; apis.json, openapi.json (3.0.3), llms.txt 200; real 404
x-submitted-by: hello@deepinquiry.ai (apis.io/add, 2026-10-15)
x-enrichment:
  date: '2026-10-18'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

DeepInquiry Verified Facts API (Machine Accountability Corp) — frequently asked questions

Does DeepInquiry Verified Facts API (Machine Accountability Corp) have an API?

Yes. APIs.io lists 2 APIs from DeepInquiry Verified Facts API (Machine Accountability Corp), including DeepInquiry Verified Facts API (Machine Accountability Corp) Facts API and DeepInquiry Verified Facts API (Machine Accountability Corp) Search API.

Is there an OpenAPI specification for the DeepInquiry Verified Facts API (Machine Accountability Corp)?

Yes. APIs.io indexes 2 OpenAPI specifications for DeepInquiry Verified Facts API (Machine Accountability Corp), each linked for download from this page.

How do I authenticate with the DeepInquiry Verified Facts API (Machine Accountability Corp)?

DeepInquiry Verified Facts API (Machine Accountability Corp) uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Deepinquiry Authentication.

How much does the DeepInquiry Verified Facts API (Machine Accountability Corp) cost?

DeepInquiry Verified Facts API (Machine Accountability Corp) publishes its prices; its Starter plan is $59 as of 2026-10-18. APIs.io lists 5 pricing plans for DeepInquiry Verified Facts API (Machine Accountability Corp), with each plan's price, limits and inclusions under Pricing on this page.

Does DeepInquiry Verified Facts API (Machine Accountability Corp) have an MCP server?

Yes. APIs.io lists 1 MCP server for DeepInquiry Verified Facts API (Machine Accountability Corp): Remote MCP server at www.deepinquiry.ai requiring an API key.

Is the DeepInquiry Verified Facts API (Machine Accountability Corp) ready for AI agents?

DeepInquiry Verified Facts API (Machine Accountability Corp) has a Kin Score of 47.0 out of 100 (developing) and an Agent Readiness score of 38.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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