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 18 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.2/100 thin ▬ flat Agent 31/100 agent ready Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company AI Agents Agent Testing Developer Tools API Testing Sandbox Evaluation Infrastructure

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 35.2/100 · thin

Contract Quality 11.5 / 23

Developer Ergonomics 13.2 / 18

Access Clarity 0.0 / 18

Operational Transparency 0.3 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 31/100 · 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 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

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

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/archal: 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 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.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Archal Auth API

OPEN COLLECTION

Archal Auth Catalog API

OPEN COLLECTION

Archal Auth Results API

OPEN COLLECTION

Archal Auth Runtime API

OPEN COLLECTION

Archal Auth Sessions API

OPEN COLLECTION

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

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

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

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Conformance

DataModel

Arazzo

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

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.
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  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: '0.23'
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:
  - Authentication
  tags_raw:
  - 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: Website
  url: https://www.archal.ai/
- 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: X-MCPServerCandidate
  url: mcp/archal-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- 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

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