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, API, 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
59.8/100 strong Agent 36/100 agent ready Full breakdown ↓
scored 2026-10-18 · rubric v0.24.0
1 published contract 1 MCP Servers
CompanyAPIFactsVerificationData

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-18 · rubric v0.24.0
Composite quality — 59.8/100 · strong
Contract Quality 13.6 / 21
Developer Ergonomics 6.9 / 17
Access Clarity 12.4 / 17
Operational Transparency 3.1 / 11
Contract Governance 8.1 / 10
Discoverability 5.5 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 36/100 · 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 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 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
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/.
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/deepinquiry: 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 →

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

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

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

0 properties

JSON SCHEMA

SearchResult

0 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
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
AgenticAccess
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 WellKnown
WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Conformance
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
Plans
 Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
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)

apis.yml Raw ↑ 
aid: deepinquiry
name: DeepInquiry Verified Facts API (Machine Accountability Corp)
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
- 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

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