Atla

Atla builds frontier AI evaluation models (Selene) and Atla Insights, an observability platform for monitoring and improving AI agents. Its Insights Data API exposes OpenTelemetry-based traces and spans of instrumented agent runs — list with time-window and metadata filters, fetch multiple by ID, and retrieve a single trace with full spans, summaries, and custom metrics. Atla ships official Python and JavaScript SDKs and an MCP server. The company is UK-based and backed by Creandum. Note: the Atla Insights platform is scheduled to sunset on 16 February 2026, and the separate Selene evaluation API SDK and MCP server were archived in 2025.

Atla publishes 1 API on the APIs.io network: SDK API. Tagged areas include Company, Software-as-a-Service, Artificial Intelligence, LLM Evaluation, and AI Agents.

Atla’s developer surface includes documentation, API reference, getting-started guide, support, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.0/100 thin ▬ flat Agent 24/100 agent aware Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

1 APIs 1 MCP Servers

Company Software-as-a-Service Artificial Intelligence LLM Evaluation AI Agents Observability Monitoring OpenTelemetry

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 33.0/100 · thin

Contract Quality 10.4 / 21

Developer Ergonomics 10.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.5 / 10

Discoverability 6.1 / 9

Regulatory Posture 2.3 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 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 4 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/atla: 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 1

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

Atla SDK API

The SDK API from Atla — 3 operation(s) for sdk.

Open Collections 2

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

API Collection

OPEN COLLECTION

Atla Insights SDK API

OPEN COLLECTION

MCP Servers 1

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

Atla MCP Server

Official MCP server providing a standardized interface for LLMs to interact with the Atla API (Selene evaluation). Repository archived by the provider.

MCP SERVER

Security Posture 2

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

Atla Authentication

http · 1 scheme

SECURITY

Atla Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

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

MCPServer

LLMsTxt

WellKnown

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

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

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

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: atla
name: Atla
description: 'Atla builds frontier AI evaluation models (Selene) and Atla Insights, an observability platform for monitoring
  and improving AI agents. Its Insights Data API exposes OpenTelemetry-based traces and spans of instrumented agent runs —
  list with time-window and metadata filters, fetch multiple by ID, and retrieve a single trace with full spans, summaries,
  and custom metrics. Atla ships official Python and JavaScript SDKs and an MCP server. The company is UK-based and backed
  by Creandum. Note: the Atla Insights platform is scheduled to sunset on 16 February 2026, and the separate Selene evaluation
  API SDK and MCP server were archived in 2025.'
url: https://raw.githubusercontent.com/api-evangelist/atla/refs/heads/main/apis.yml
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
  generated: '2026-09-03'
  method: derived
image: https://avatars.githubusercontent.com/atla-ai
x-type: company
x-source: vc-portfolio
x-backed-by:
- creandum
x-tier: stub
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
- Software-as-a-Service
- Artificial Intelligence
- LLM Evaluation
- AI Agents
- Observability
- Monitoring
- OpenTelemetry
tags_raw:
- Company
- SaaS
- Artificial Intelligence
- LLM Evaluation
- AI Agents
- Observability
- Monitoring
- OpenTelemetry
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: atla:atla-sdk-api
  name: Atla SDK API
  description: The SDK API from Atla — 3 operation(s) for sdk.
  humanURL: https://docs.atla-ai.com/api-reference/overview
  baseURL: https://app.atla-ai.com
  tags:
  - SDK
  properties:
  - type: OpenAPI
    url: openapi/atla-sdk-api-openapi.yml
common:
- type: Overlay
  url: overlays/atla-insights-overlay.yaml
- type: DeveloperPortal
  url: https://docs.atla-ai.com/
- type: Documentation
  url: https://docs.atla-ai.com/
- type: APIReference
  url: https://docs.atla-ai.com/api-reference/overview
- type: GettingStarted
  url: https://docs.atla-ai.com/quickstart
- type: Support
  url: https://docs.atla-ai.com/troubleshooting-faq
- type: GitHubOrganization
  url: https://github.com/atla-ai
- type: Website
  url: https://www.atla-ai.com/
- type: Authentication
  url: authentication/atla-authentication.yml
- type: DomainSecurity
  url: security/atla-domain-security.yml
- type: Packages
  url: packages/atla-packages.yml
- type: SDKs
  url: packages/atla-packages.yml
- type: MCPServer
  url: mcp/atla-mcp.yml
- type: LLMsTxt
  url: llms/atla-llms.txt
- type: WellKnown
  url: well-known/atla-well-known.yml
- type: Conformance
  url: conformance/atla-conformance.yml
- type: ErrorCatalog
  url: errors/atla-problem-types.yml
- type: Lifecycle
  url: lifecycle/atla-lifecycle.yml
- type: Conventions
  url: conventions/atla-conventions.yml
- type: DataModel
  url: data-model/atla-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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