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 2 API contracts indexed on the APIs.io network: Sessions API and Environments API. Tagged areas include Company, AI Agents, Agent Testing, Developer Tools, and API Testing.

The Archal catalog on APIs.io includes 1 Spectral governance ruleset.

Archal’s developer surface includes authentication, documentation, API reference, getting-started guide, CLI, sandbox, and 18 more developer resources.

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35.5/100 thin ▬ flat Agent 35/100 agent ready Front door AI 5/6 prominent Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 2 Agent Skills

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

Kin Score

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

Composite quality — 35.5/100 · thin

Contract Quality 8.7 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 0.0 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.4 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · 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 7 / 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

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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Contract Quality scores 46.6 — up to +13.4 composite points
Operational Transparency scores 2.6 — up to +12.7 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/archal/apis.yml: open an issue on github.com/api-evangelist/archal 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.

Archal Sessions API

Hosted clone session lifecycle.

Archal Environments API

The Environments API from Archal — 3 operation(s) for environments.

Open Collections 5

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

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

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Inspect Archal runs, traces, and results

AGENT SKILL

Run an agent against an Archal clone session

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Archal API Rules

55 rules · 50 errors 4 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.

Archal Openapi Overlay

3 actions · update · archal-openapi-original.json

DERIVED

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: '2026-11-06'
  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'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-19
x-docs-hosting: vercel
tags:
- Company
- AI Agents
- Agent Testing
- Developer Tools
- API Testing
- Sandbox
- Evaluation
- Infrastructure
apis:
- aid: archal:archal-sessions-api
  name: Archal Sessions API
  description: Hosted clone session lifecycle.
  humanURL: https://docs.archal.ai
  baseURL: https://api.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
- aid: archal:archal-environments-api
  name: Archal Environments API
  description: The Environments API from Archal — 3 operation(s) for environments.
  humanURL: https://docs.archal.ai
  baseURL: https://api.archal.ai
  tags:
  - Environment
  tags_raw:
  - Environments
  properties:
  - type: OpenAPI
    url: openapi/archal-environments-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

Archal API — frequently asked questions

Does Archal have an API?

Yes. APIs.io lists 2 APIs from Archal, including Archal Sessions API and Archal Environments API.

Is there an OpenAPI specification for the Archal API?

Yes. APIs.io indexes 2 OpenAPI specifications for Archal, each linked for download from this page.

How do I authenticate with the Archal API?

Archal uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Archal Authentication.

Is the Archal API ready for AI agents?

Archal has a Kin Score of 35.5 out of 100 (thin) and an Agent Readiness score of 35.2 (agent-ready), scored by API Evangelist on 2026-11-06.

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