Truth Systems

Truth Systems builds AI governance and hallucination-detection infrastructure for regulated industries, with a focus on legal firms. Gateway, its core API product, fact-checks LLM-generated text against customer source documents in real time - decomposing a claim into statements, retrieving evidence, and returning SUPPORTS / REFUTES / NOT_ENOUGH_INFO verdicts with character-level evidence spans. Gateway deploys into the customer's own AWS or Azure account via Terraform, with a Python SDK. The company also offers Charter (AI governance for human users) and Alexandria (agent-focused governance), and is backed by Lightspeed Venture Partners.

Truth Systems publishes 1 API on the APIs.io network: Get Context Output API. Tagged areas include Company, Artificial Intelligence, AI Governance, Hallucination Detection, and Fact Checking.

Truth Systems’ developer surface includes developer portal, documentation, support, authentication, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
30.5/100 thin ▬ flat Agent 51/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
CompanyArtificial IntelligenceAI GovernanceHallucination DetectionFact CheckingComplianceLegal

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 30.5/100 · thin
Contract Quality 9.7 / 25
Developer Ergonomics 10.9 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 51/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/truth-systems: 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 1

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

Truth Systems Get Context Output API

The Get Context Output API from Truth Systems — 1 operation(s) for get context output.

MCP Servers 1

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

truth-systems-mcp.yml

MCP SERVER

Security Posture 2

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

Truth Systems Authentication

aws-iam/apiKey · 2 schemes

SECURITY

Truth Systems Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 DataModel
DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

Support
Support

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: truth-systems
name: Truth Systems
description: Truth Systems builds AI governance and hallucination-detection infrastructure for regulated industries, with
  a focus on legal firms. Gateway, its core API product, fact-checks LLM-generated text against customer source documents
  in real time - decomposing a claim into statements, retrieving evidence, and returning SUPPORTS / REFUTES / NOT_ENOUGH_INFO
  verdicts with character-level evidence spans. Gateway deploys into the customer's own AWS or Azure account via Terraform,
  with a Python SDK. The company also offers Charter (AI governance for human users) and Alexandria (agent-focused governance),
  and is backed by Lightspeed Venture Partners.
url: https://raw.githubusercontent.com/api-evangelist/truth-systems/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
image: https://www.truthsystems.ai/truthsystems-logo.svg
tags:
- Company
- Artificial Intelligence
- AI Governance
- Hallucination Detection
- Fact Checking
- Compliance
- Legal
apis:
- aid: truth-systems:truth-systems-get-context-output-api
  name: Truth Systems Get Context Output API
  description: The Get Context Output API from Truth Systems — 1 operation(s) for get context output.
  humanURL: https://docs.truthsystems.ai/introduction
  baseURL: https://www.truthsystems.ai
  tags:
  - Get Context Output
  properties:
  - type: OpenAPI
    url: openapi/truth-systems-get-context-output-api-openapi.yml
  - type: Documentation
    url: https://docs.truthsystems.ai/introduction
  - type: APIReference
    url: https://docs.truthsystems.ai/api-reference/openapi.json
  - type: GettingStarted
    url: https://docs.truthsystems.ai/sdk/installation
  - type: Examples
    url: examples/truth-systems-gateway-examples.yml
common:
- type: DomainSecurity
  url: security/truth-systems-domain-security.yml
- type: Website
  url: https://www.truthsystems.ai
- type: Portal
  url: https://docs.truthsystems.ai
- type: Documentation
  url: https://docs.truthsystems.ai/introduction
- type: GitHubOrganization
  url: https://github.com/TruthSystems
- type: Support
  url: mailto:info@truthsystems.com
- type: LLMsTxt
  url: llms/truth-systems-llms.txt
- type: MCPServer
  url: mcp/truth-systems-mcp.yml
- type: Packages
  url: packages/truth-systems-packages.yml
- type: SDKs
  url: packages/truth-systems-packages.yml
- type: Authentication
  url: authentication/truth-systems-authentication.yml
- type: Conventions
  url: conventions/truth-systems-conventions.yml
- type: ErrorCatalog
  url: errors/truth-systems-problem-types.yml
- type: Conformance
  url: conformance/truth-systems-conformance.yml
- type: DataModel
  url: data-model/truth-systems-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 15
  pass: local-v1