Archal website screenshot

Archal

Archal is a Y Combinator (S26) company building QA and an improvement loop for AI agents. It provisions hosted, service-shaped CLONES of real SaaS services — GitHub, Slack, Stripe, Jira, Linear, Supabase, Ramp, HubSpot, Datadog, Discord, Google Workspace and more — so an agent that can send emails, change code repositories, or call third-party APIs is tested and scored before it touches production. Clones hold state, enforce referential integrity, and return authentic error shapes, unlike traditional mocks. Its Autoloop turns real production agent traces into reproducible failures and can open a fix PR. Archal ships an npm CLI and Vitest SDK, a device-auth login, a runtime clone proxy, and per-session MCP endpoints.

Archal publishes 5 APIs on the APIs.io network, including Auth API, Catalog API, Results API, and 2 more. Tagged areas include Company, AI Agents, Agent Testing, Developer Tools, and API Testing.

Archal’s developer surface includes authentication, documentation, API reference, getting-started guide, CLI, sandbox, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.1/100 thin ▬ flat Agent 74/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
5 APIs 1 MCP Servers
CompanyAI AgentsAgent TestingDeveloper ToolsAPI TestingSandboxEvaluationInfrastructure

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 40.1/100 · thin
Contract Quality 13.4 / 25
Developer Ergonomics 16.1 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 74/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 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/archal: 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 5

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

Archal Auth API

CLI and device authentication.

Archal Catalog API

Clone and scenario discovery.

Archal Results API

Run, trace, and test-result reporting.

Archal Runtime API

Direct calls into a running clone.

Archal Sessions API

Hosted clone session lifecycle.

Arazzo Workflows 2

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

Create an Archal clone session, drive it, and read the trace

Provision a hosted clone session, POST a request into the cloned service through the runtime proxy, read the resulting trace, then stop the session.

ARAZZO

MCP Servers 1

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

archal-mcp.yml

MCP SERVER

Security Posture 2

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

Archal Authentication

apiKey/http · 2 schemes

SECURITY

Archal Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Archal Agentic Access

16 operations · 7 acting · 1 human-in-the-loop

16 operations · 7 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Sandbox
Sandbox

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
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Arazzo
Arazzo

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: archal
name: Archal
description: Archal is a Y Combinator (S26) company building QA and an improvement loop for AI agents. It provisions hosted,
  service-shaped CLONES of real SaaS services — GitHub, Slack, Stripe, Jira, Linear, Supabase, Ramp, HubSpot, Datadog, Discord,
  Google Workspace and more — so an agent that can send emails, change code repositories, or call third-party APIs is tested
  and scored before it touches production. Clones hold state, enforce referential integrity, and return authentic error shapes,
  unlike traditional mocks. Its Autoloop turns real production agent traces into reproducible failures and can open a fix
  PR. Archal ships an npm CLI and Vitest SDK, a device-auth login, a runtime clone proxy, and per-session MCP endpoints.
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
image: https://docs.archal.ai/logo/dark.svg
url: https://raw.githubusercontent.com/api-evangelist/archal/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- AI Agents
- Agent Testing
- Developer Tools
- API Testing
- Sandbox
- Evaluation
- Infrastructure
apis:
- aid: archal:archal-auth-api
  name: Archal Auth API
  description: CLI and device authentication.
  humanURL: https://docs.archal.ai
  baseURL: https://archal.ai
  tags:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/archal-auth-api-openapi.yml
  - type: Documentation
    url: https://docs.archal.ai
  - type: APIReference
    url: https://docs.archal.ai/api-reference
  - type: Quickstart
    url: https://docs.archal.ai/quickstart
- aid: archal:archal-catalog-api
  name: Archal Catalog API
  description: Clone and scenario discovery.
  humanURL: https://docs.archal.ai
  baseURL: https://archal.ai
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/archal-catalog-api-openapi.yml
  - type: Documentation
    url: https://docs.archal.ai
  - type: APIReference
    url: https://docs.archal.ai/api-reference
  - type: Quickstart
    url: https://docs.archal.ai/quickstart
- aid: archal:archal-results-api
  name: Archal Results API
  description: Run, trace, and test-result reporting.
  humanURL: https://docs.archal.ai
  baseURL: https://archal.ai
  tags:
  - Results
  properties:
  - type: OpenAPI
    url: openapi/archal-results-api-openapi.yml
  - type: Documentation
    url: https://docs.archal.ai
  - type: APIReference
    url: https://docs.archal.ai/api-reference
  - type: Quickstart
    url: https://docs.archal.ai/quickstart
- aid: archal:archal-runtime-api
  name: Archal Runtime API
  description: Direct calls into a running clone.
  humanURL: https://docs.archal.ai
  baseURL: https://archal.ai
  tags:
  - Runtime
  properties:
  - type: OpenAPI
    url: openapi/archal-runtime-api-openapi.yml
  - type: Documentation
    url: https://docs.archal.ai
  - type: APIReference
    url: https://docs.archal.ai/api-reference
  - type: Quickstart
    url: https://docs.archal.ai/quickstart
- aid: archal:archal-sessions-api
  name: Archal Sessions API
  description: Hosted clone session lifecycle.
  humanURL: https://docs.archal.ai
  baseURL: https://archal.ai
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/archal-sessions-api-openapi.yml
  - type: Documentation
    url: https://docs.archal.ai
  - type: APIReference
    url: https://docs.archal.ai/api-reference
  - type: Quickstart
    url: https://docs.archal.ai/quickstart
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/archal-agentic-access.yml
- type: DomainSecurity
  url: security/archal-domain-security.yml
- type: Authentication
  url: authentication/archal-authentication.yml
- type: DeveloperPortal
  url: https://docs.archal.ai
- type: Documentation
  url: https://docs.archal.ai
- type: APIReference
  url: https://docs.archal.ai/api-reference
- type: GettingStarted
  url: https://docs.archal.ai/quickstart
- type: GitHubOrganization
  url: https://github.com/Archal-Labs
- type: Packages
  url: packages/archal-packages.yml
- type: SDKs
  url: packages/archal-packages.yml
- type: CLI
  url: cli/archal-cli.yml
- type: Sandbox
  url: sandbox/archal-sandbox.yml
- type: Conventions
  url: conventions/archal-conventions.yml
- type: Idempotency
  url: conventions/archal-conventions.yml
- type: ErrorCatalog
  url: errors/archal-problem-types.yml
- type: Lifecycle
  url: lifecycle/archal-lifecycle.yml
- type: Conformance
  url: conformance/archal-conformance.yml
- type: MCPServer
  url: mcp/archal-mcp.yml
- type: LLMsTxt
  url: llms/archal-llms.txt
- type: Overlay
  url: overlays/archal-openapi-overlay.yaml
- type: DataModel
  url: data-model/archal-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Create an Archal clone session, drive it, and read the trace
  url: arazzo/archal-create-and-evaluate.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence