Miriel

Miriel is the context engine and platform for AI-native development. It gives AI apps and agents the context they need in real time through a simple API: developers connect a data source with the learn operation and retrieve relevant context with the query operation, backed by LLM, vector, and knowledge-graph retrieval. Every interaction is encrypted and permissions are managed at the token level (per-user grants and policies). Built by a team with backgrounds across Google, Tesla, Facebook, and Posit, Miriel handles intelligent indexing and retrieval tailored to each source, plus Labs projects (Nora, Floodlight) and tools like Autodev and NexusBuild. Backed by Foundry Group.

Miriel is listed with 7 APIs on the APIs.io network, including Documents API, Learn API, Monitoring API, and 4 more. Tagged areas include Company, Artificial Intelligence, Context Engine, Retrieval, and RAG.

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

Miriel’s developer surface includes documentation, API reference, engineering blog, signup flow, authentication, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.5/100 thin ▬ flat Agent 20/100 agent aware Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

7 APIs 2 Agent Skills

Company Artificial Intelligence Context Engine Retrieval RAG Knowledge Graph Vector Search Agents LLM Developer Tools

Kin Score

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

Composite quality — 26.5/100 · thin

Contract Quality 2.4 / 19

Developer Ergonomics 7.4 / 15

Access Clarity 2.0 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.6 / 9

Discoverability 5.9 / 8

Regulatory Posture 2.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 12.9 — up to +21.8 composite points
Access Clarity scores 13.2 — up to +17.4 composite points
Operational Transparency scores 10.5 — up to +11.6 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/miriel/apis.yml: open an issue on github.com/api-evangelist/miriel 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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

Miriel Documents API

The Documents API from Miriel — 8 operation(s) for documents.

Miriel Learn API

The Learn API from Miriel — 1 operation(s) for learn.

Miriel Monitoring API

The Monitoring API from Miriel — 2 operation(s) for monitoring.

Miriel Policies API

The Policies API from Miriel — 3 operation(s) for policies.

Miriel Projects API

The Projects API from Miriel — 3 operation(s) for projects.

Miriel Query API

The Query API from Miriel — 1 operation(s) for query.

Miriel Users API

The Users API from Miriel — 3 operation(s) for users.

Scroll for all 7

Open Collections 7

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

Miriel Context Engine Documents API

OPEN COLLECTION

Miriel Context Engine Documents Learn API

OPEN COLLECTION

Miriel Context Engine Documents Monitoring API

OPEN COLLECTION

Miriel Context Engine Documents Policies API

OPEN COLLECTION

Miriel Context Engine Documents Projects API

OPEN COLLECTION

Miriel Context Engine Documents Query API

OPEN COLLECTION

Miriel Context Engine Documents Users API

OPEN COLLECTION

Scroll for all 7

Agent Skills 2

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

Learn a source and query context

AGENT SKILL

Manage users and document access

AGENT SKILL

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Miriel

SLA

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Miriel API Rules

45 rules · 42 errors 2 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.

Miriel Overlay

2 actions · update · miriel-openapi.yml

DERIVED

Security Posture 2

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

Miriel Authentication

apiKey · 1 scheme

SECURITY

Miriel Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Miriel Agentic Access

21 operations · 12 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

WellKnown

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

DataModel

Conformance

Lifecycle

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

StatusPage

StatusPage

Company 3

The organization behind the API

BlogRSS

BlogRSS

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: miriel
name: Miriel
description: 'Miriel is the context engine and platform for AI-native development. It gives AI apps and agents the context
  they need in real time through a simple API: developers connect a data source with the learn operation and retrieve relevant
  context with the query operation, backed by LLM, vector, and knowledge-graph retrieval. Every interaction is encrypted and
  permissions are managed at the token level (per-user grants and policies). Built by a team with backgrounds across Google,
  Tesla, Facebook, and Posit, Miriel handles intelligent indexing and retrieval tailored to each source, plus Labs projects
  (Nora, Floodlight) and tools like Autodev and NexusBuild. Backed by Foundry Group.'
url: https://raw.githubusercontent.com/api-evangelist/miriel/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- foundry-group
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  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: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
image: https://miriel.ai/MirielLogoWhiteNoTextOnBlue.svg
tags:
- Company
- Artificial Intelligence
- Context Engine
- Retrieval
- RAG
- Knowledge Graph
- Vector Search
- Agents
- LLM
- Developer Tools
tags_raw:
- Company
- Ai
- Context Engine
- Retrieval
- RAG
- Knowledge Graph
- Vector Search
- Agents
- LLM
- Developer Tools
apis:
- aid: miriel:miriel-documents-api
  name: Miriel Documents API
  description: The Documents API from Miriel — 8 operation(s) for documents.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/miriel-documents-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-learn-api
  name: Miriel Learn API
  description: The Learn API from Miriel — 1 operation(s) for learn.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Learn
  properties:
  - type: OpenAPI
    url: openapi/miriel-learn-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-monitoring-api
  name: Miriel Monitoring API
  description: The Monitoring API from Miriel — 2 operation(s) for monitoring.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Monitoring
  properties:
  - type: OpenAPI
    url: openapi/miriel-monitoring-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-policies-api
  name: Miriel Policies API
  description: The Policies API from Miriel — 3 operation(s) for policies.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Policies
  properties:
  - type: OpenAPI
    url: openapi/miriel-policies-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-projects-api
  name: Miriel Projects API
  description: The Projects API from Miriel — 3 operation(s) for projects.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/miriel-projects-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-query-api
  name: Miriel Query API
  description: The Query API from Miriel — 1 operation(s) for query.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - Query
  properties:
  - type: OpenAPI
    url: openapi/miriel-query-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
- aid: miriel:miriel-users-api
  name: Miriel Users API
  description: The Users API from Miriel — 3 operation(s) for users.
  humanURL: https://miriel.ai/docs
  baseURL: https://api.prod.miriel.ai
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/miriel-users-api-openapi.yml
  - type: Authentication
    url: authentication/miriel-authentication.yml
  - type: AgenticAccess
    url: agentic-access/miriel-agentic-access.yml
  - type: Conventions
    url: conventions/miriel-conventions.yml
  - type: DataModel
    url: data-model/miriel-data-model.yml
  - type: Conformance
    url: conformance/miriel-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://corp-api.prod.miriel.ai/miriel-ui-api/blog/rss.xml
  type: BlogRSS
- type: DeveloperPortal
  url: https://miriel.ai/docs
- type: Documentation
  url: https://miriel.ai/docs
- type: APIReference
  url: https://miriel.ai/docs
- type: Blog
  url: https://miriel.ai/blog
- type: GitHubOrganization
  url: https://github.com/miriel-ai
- type: SignUp
  url: https://app.miriel.ai
- type: Login
  url: https://app.miriel.ai
- type: LLMsTxt
  url: llms/miriel-llms.txt
- type: Overlay
  url: overlays/miriel-overlay.yaml
- type: Authentication
  url: authentication/miriel-authentication.yml
- type: AgenticAccess
  url: agentic-access/miriel-agentic-access.yml
- type: Conventions
  url: conventions/miriel-conventions.yml
- type: DataModel
  url: data-model/miriel-data-model.yml
- type: Conformance
  url: conformance/miriel-conformance.yml
- type: Packages
  url: packages/miriel-packages.yml
- type: SDKs
  url: packages/miriel-packages.yml
- type: X-MCPServerCandidate
  url: mcp/miriel-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: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/miriel-well-known.yml
- type: Lifecycle
  url: lifecycle/miriel-lifecycle.yml
- type: StatusPage
  url: https://status.miriel.ai
- type: DomainSecurity
  url: security/miriel-domain-security.yml
- type: Website
  url: https://miriel.ai
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1

Miriel API — frequently asked questions

Does Miriel have an API?

Yes. APIs.io lists 7 APIs from Miriel, including Miriel Documents API, Miriel Learn API and Miriel Monitoring API, and 4 more.

Is there an OpenAPI specification for the Miriel API?

Yes. APIs.io indexes 7 OpenAPI specifications for Miriel, each linked for download from this page.

How do I authenticate with the Miriel API?

Miriel uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Miriel Authentication.

Is the Miriel API ready for AI agents?

Miriel has a Kin Score of 26.5 out of 100 (thin) and an Agent Readiness score of 19.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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