Not Diamond

Not Diamond is an AI model router that determines the best LLM to call for any given prompt. Its REST API routes each request to the optimal model across providers based on quality, cost, and latency tradeoffs, accepts real-time feedback to personalize routing, and can train custom routers from evaluation datasets.

Not Diamond publishes 4 APIs on the APIs.io network, including Custom Routers API, Feedback API, Model Routing API, and 1 more. Tagged areas include Artificial Intelligence, LLM, Model Routing, Router, and Orchestration.

Not Diamond’s developer surface includes authentication, engineering blog, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.2/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessPaidSelf serve

4 APIs

Artificial Intelligence LLM Model Routing Router Orchestration

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 35.2/100 · thin

Contract Quality 13.8 / 25

Developer Ergonomics 3.8 / 20

Access Clarity 5.8 / 20

Operational Transparency 4.4 / 13

Contract Governance 0.0 / 12

Discoverability 7.4 / 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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/notdiamond: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

Rate Limits 1

Documented rate limits and quota policies.

Notdiamond Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Source (apis.yml)

aid: notdiamond
url: https://raw.githubusercontent.com/api-evangelist/notdiamond/refs/heads/main/apis.yml
name: Not Diamond
kind: company
description: Not Diamond is an AI model router that determines the best LLM to call for any given prompt. Its REST API routes
  each request to the optimal model across providers based on quality, cost, and latency tradeoffs, accepts real-time feedback
  to personalize routing, and can train custom routers from evaluation datasets.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/notdiamond.png
tags:
- Artificial Intelligence
- LLM
- Model Routing
- Router
- Orchestration
tags_raw:
- AI
- LLM
- Model Routing
- Router
- Orchestration
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: notdiamond:notdiamond-custom-routers-api
  name: Not Diamond Custom Routers API
  description: The Custom Routers API from Not Diamond — 2 operation(s) for custom routers.
  humanURL: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  baseURL: https://api.notdiamond.ai/v2
  tags:
  - Custom Routers
  properties:
  - type: OpenAPI
    url: openapi/notdiamond-custom-routers-api-openapi.yml
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/quickstart
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  - type: PostmanCollection
    url: collections/notdiamond.postman_collection.json
  - type: OpenCollection
    url: collections/notdiamond.opencollection.json
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/list_models_v2_models_get
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/real-time-personalization
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/train_custom_router_v2_pzn_traincustomrouter_post
- aid: notdiamond:notdiamond-feedback-api
  name: Not Diamond Feedback API
  description: The Feedback API from Not Diamond — 2 operation(s) for feedback.
  humanURL: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  baseURL: https://api.notdiamond.ai/v2
  tags:
  - Feedback
  properties:
  - type: OpenAPI
    url: openapi/notdiamond-feedback-api-openapi.yml
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/quickstart
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  - type: PostmanCollection
    url: collections/notdiamond.postman_collection.json
  - type: OpenCollection
    url: collections/notdiamond.opencollection.json
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/list_models_v2_models_get
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/real-time-personalization
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/train_custom_router_v2_pzn_traincustomrouter_post
- aid: notdiamond:notdiamond-model-routing-api
  name: Not Diamond Model Routing API
  description: The Model Routing API from Not Diamond — 1 operation(s) for model routing.
  humanURL: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  baseURL: https://api.notdiamond.ai/v2
  tags:
  - Model Routing
  properties:
  - type: OpenAPI
    url: openapi/notdiamond-model-routing-api-openapi.yml
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/quickstart
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  - type: PostmanCollection
    url: collections/notdiamond.postman_collection.json
  - type: OpenCollection
    url: collections/notdiamond.opencollection.json
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/list_models_v2_models_get
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/real-time-personalization
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/train_custom_router_v2_pzn_traincustomrouter_post
- aid: notdiamond:notdiamond-models-api
  name: Not Diamond Models API
  description: The Models API from Not Diamond — 1 operation(s) for models.
  humanURL: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  baseURL: https://api.notdiamond.ai/v2
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/notdiamond-models-api-openapi.yml
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/quickstart
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/token_model_select_v2_modelrouter_modelselect_post
  - type: PostmanCollection
    url: collections/notdiamond.postman_collection.json
  - type: OpenCollection
    url: collections/notdiamond.opencollection.json
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/list_models_v2_models_get
  - type: Documentation
    url: https://docs.notdiamond.ai/docs/real-time-personalization
  - type: APIReference
    url: https://docs.notdiamond.ai/reference/train_custom_router_v2_pzn_traincustomrouter_post
common:
- type: AgenticAccess
  url: agentic-access/notdiamond-agentic-access.yml
- type: DomainSecurity
  url: security/notdiamond-domain-security.yml
- type: Authentication
  url: authentication/notdiamond-authentication.yml
- url: https://www.notdiamond.ai/blog
  type: Blog
- type: GitHubOrganization
  url: https://github.com/Not-Diamond
- type: LinkedIn
  url: https://www.linkedin.com/company/not-diamond
- type: Website
  url: https://www.notdiamond.ai
- type: Documentation
  url: https://docs.notdiamond.ai
- type: Plans
  url: plans/notdiamond-plans-pricing.yml
- type: RateLimits
  url: rate-limits/notdiamond-rate-limits.yml
- type: FinOps
  url: finops/notdiamond-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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Not Diamond

Kin Score

APIs 4

Not Diamond Custom Routers API

Not Diamond Feedback API

Not Diamond Model Routing API

Not Diamond Models API

Open Collections 6

API Collection

Not Diamond Custom Routers API

Not Diamond Custom Routers Feedback API

Not Diamond Custom Routers Model Routing API

Not Diamond Custom Routers Models API

Not Diamond API

Pricing Plans 1

Notdiamond Plans Pricing

Rate Limits 1

Notdiamond Rate Limits

FinOps 1

Notdiamond Finops

Security Posture 2

Notdiamond Authentication

Notdiamond Domain Security

Agentic Access 1

Notdiamond Agentic Access

Resources