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

34.8/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

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 2026-09-08 · rubric v0.20.0

Composite quality — 34.8/100 · thin

Contract Quality 13.6 / 25

Developer Ergonomics 12.7 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.5 / 12

Discoverability 7.6 / 10

Agent readiness — 26/100 · 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

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.

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'
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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