Keywords AI

Keywords AI is an LLM observability and gateway platform. It exposes an OpenAI-compatible proxy (chat completions across 250+ models) plus REST APIs for request logging, prompt management, threads, evaluations, and traces - all under a single Bearer-authenticated API at https://api.keywordsai.co/api. (The company is rebranding to Respan; the keywordsai.co host and API remain active.)

Keywords AI publishes 9 APIs on the APIs.io network, including Datasets API, Evaluators API, Experiments API, and 6 more. Tagged areas include Artificial Intelligence, LLM, Observability, Gateway, and Monitoring.

The Keywords AI catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Keywords AI’s developer surface includes authentication, documentation, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.1/100 developing ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Artificial Intelligence LLM Observability Gateway Monitoring

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 41.1/100 · developing

Contract Quality 13.7 / 23

Developer Ergonomics 4.1 / 18

Access Clarity 8.5 / 18

Operational Transparency 4.0 / 12

Contract Governance 1.2 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 23/100 · 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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 Well-Known Document 0 / 5

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.

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/keywordsai: 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 9

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

Keywords AI Datasets API

Datasets and dataset logs.

Keywords AI Evaluators API

Output-scoring evaluators.

Keywords AI Experiments API

Prompt / model experiments.

Keywords AI Gateway API

OpenAI-compatible LLM proxy (chat completions).

Keywords AI Logging API

Asynchronous request / span logging.

Keywords AI Prompts API

Prompt and prompt-version management.

Keywords AI Threads API

Multi-turn conversation threads.

Keywords AI Traces API

OpenTelemetry-aligned distributed traces.

Keywords AI Users API

End-user (customer) analytics.

Scroll for all 9

Open Collections 11

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

API Collection

OPEN COLLECTION

Keywords AI Datasets API

OPEN COLLECTION

Keywords AI Datasets Evaluators API

OPEN COLLECTION

Keywords AI Datasets Experiments API

OPEN COLLECTION

Keywords AI Datasets Gateway API

OPEN COLLECTION

Keywords AI Datasets Logging API

OPEN COLLECTION

Keywords AI Datasets Prompts API

OPEN COLLECTION

Keywords AI Datasets Threads API

OPEN COLLECTION

Keywords AI Datasets Traces API

OPEN COLLECTION

Keywords AI Datasets Users API

OPEN COLLECTION

Keywords AI API

OPEN COLLECTION

Scroll for all 11

Pricing Plans 1

Published pricing tiers and plan structures.

Keywordsai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Keywordsai Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Keywordsai Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Keywords AI Chat Completions Streaming (HTTP + SSE)

AsyncAPI 2.6 description of Keywords AI's **chat completion streaming** surface on the OpenAI-compatible gateway. Keywords AI does not publish a WebSocket API. The only asynchro...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Keywords AI API Rules

5 rules · 1 errors 4 warnings

SPECTRAL

Security Posture 3

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

Keywordsai Authentication

http · 1 scheme

SECURITY

Keywordsai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Keywordsai Trust Center

HIPAA, GDPR

SECURITY

Agentic Access 1

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

Keywordsai Agentic Access

20 operations · 15 acting

AGENTIC

Resources

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 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

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 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: keywordsai
url: https://raw.githubusercontent.com/api-evangelist/keywordsai/refs/heads/main/apis.yml
name: Keywords AI
kind: company
description: Keywords AI is an LLM observability and gateway platform. It exposes an OpenAI-compatible proxy (chat completions
  across 250+ models) plus REST APIs for request logging, prompt management, threads, evaluations, and traces - all under
  a single Bearer-authenticated API at https://api.keywordsai.co/api. (The company is rebranding to Respan; the keywordsai.co
  host and API remain active.)
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  - url: https://www.keywordsai.co
    status: 301
    note: declared website redirects to https://www.respan.ai/ — a different registrable domain (keywordsai.co -> respan.ai),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/keywordsai.png
tags:
- Artificial Intelligence
- LLM
- Observability
- Gateway
- Monitoring
tags_raw:
- AI
- LLM
- Observability
- Gateway
- Monitoring
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: keywordsai:keywordsai-datasets-api
  name: Keywords AI Datasets API
  description: Datasets and dataset logs.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-datasets-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-evaluators-api
  name: Keywords AI Evaluators API
  description: Output-scoring evaluators.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Evaluators
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-evaluators-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-experiments-api
  name: Keywords AI Experiments API
  description: Prompt / model experiments.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Experiments
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-experiments-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-gateway-api
  name: Keywords AI Gateway API
  description: OpenAI-compatible LLM proxy (chat completions).
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Gateway
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-gateway-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-logging-api
  name: Keywords AI Logging API
  description: Asynchronous request / span logging.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Logging
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-logging-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-prompts-api
  name: Keywords AI Prompts API
  description: Prompt and prompt-version management.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Prompts
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-prompts-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-threads-api
  name: Keywords AI Threads API
  description: Multi-turn conversation threads.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Threads
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-threads-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-traces-api
  name: Keywords AI Traces API
  description: OpenTelemetry-aligned distributed traces.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - Traces
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-traces-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
- aid: keywordsai:keywordsai-users-api
  name: Keywords AI Users API
  description: End-user (customer) analytics.
  humanURL: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  baseURL: https://api.keywordsai.co/api
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/keywordsai-users-api-openapi.yml
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: APIReference
    url: https://docs.keywordsai.co/api-endpoints/integration/chat-completions
  - type: AsyncAPI
    url: asyncapi/keywordsai-asyncapi.yml
  - type: PostmanCollection
    url: collections/keywordsai.postman_collection.json
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/async-endpoints/request-logging-endpoint
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/prompt-endpoints/create-prompts
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-threads
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/evaluator-endpoints/create-evaluator
  - type: Documentation
    url: https://docs.keywordsai.co/api-endpoints/data-endpoints/list-traces
common:
- type: AgenticAccess
  url: agentic-access/keywordsai-agentic-access.yml
- type: TrustCenter
  url: security/keywordsai-trust-center.yml
- type: DomainSecurity
  url: security/keywordsai-domain-security.yml
- type: Authentication
  url: authentication/keywordsai-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Keywords-AI
- type: LinkedIn
  url: https://www.linkedin.com/company/keywordsai
- type: Website
  url: https://www.keywordsai.co
- type: Documentation
  url: https://docs.keywordsai.co
- type: Plans
  url: plans/keywordsai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/keywordsai-rate-limits.yml
- type: FinOps
  url: finops/keywordsai-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/keywordsai"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/keywordsai/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/keywordsai/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.