Evidence

Evidence is an open-source (MIT) business-intelligence-as-code framework that turns SQL queries plus Markdown into fast, version-controlled static data apps and dashboards. It is built on Svelte/Vite, runs queries through a DuckDB-WASM "Universal SQL" engine, and is consumed as a framework/CLI rather than a hosted REST API. Evidence Cloud adds managed hosting, a managed query engine, scheduled data syncs, and AI authoring assistance.

Evidence publishes 3 API contracts indexed on the APIs.io network: Framework (SQL + Markdown), USQL / Query Layer, and Cloud. Tagged areas include Business Intelligence, BI-as-Code, SQL, Markdown, and Data Apps.

Evidence’s developer surface includes documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

21.0/100 emerging ▬ flat Agent 14/100 agent aware Front door AI 3/6 light Heartbeat 78/100 alive open core · MIT Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 published contract

Business IntelligenceBI-as-CodeSQL Markdown Data Apps Open Source

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 21.0/100 · emerging

Contract Quality 6.8 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 2.9 / 17

Operational Transparency 1.3 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 14/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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 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 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/.

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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 Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 32.1 — up to +17.0 composite points Ask about this →
Access Clarity scores 17.0 — up to +16.6 composite points Ask about this →
Developer Ergonomics scores 19.0 — up to +16.2 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/evidence-dev/apis.yml: open an issue on github.com/api-evangelist/evidence-dev 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Business Intelligence, Analytics and Visualization	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

Markdown

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Evidence Framework (SQL + Markdown)

The open-source core. SQL statements embedded in Markdown files run against configured data sources and render charts and components into a static BI website (Svelte/Vite). The ...

Evidence USQL / Query Layer

Universal SQL, the query engine built into Evidence core and powered by DuckDB's WebAssembly distribution. It extracts data sources to Parquet and lets you query across multiple...

Evidence Cloud

The managed hosting and deployment platform for Evidence projects. Adds a managed query engine, multi-level caching, row-level security, scheduled data syncs, a browser-based ID...

Open Collections 1

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

Evidence (Framework - not a REST API)

OPEN COLLECTION

Evidence API pricing

Not yet checked against Evidence's own pricing page. Compiled by API Evangelist on 2026-06-20 from evidence.dev/pricing; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Open Source (MIT) free	—
Evidence Cloud Team paid	—
Evidence Cloud Pro paid	—
Evidence Cloud Enterprise enterprise	—
AI Credit Overage usage	—

Plan details, limits and sources →

Rate limits

Open-Source Framework / CLI: bound by local machine and upstream data source limits queries
Evidence Cloud Seats: see provider pricing users
AI Credits: 1,000/user/month (Team), 3,000/user/month (Pro), custom (Enterprise) ai credits

Compiled by API Evangelist, not yet checked against Evidence's documentation. All 4 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Evidence Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Evidence Rate Limits

4 limits

RATE LIMITS

Compliance 1

Attestations the provider states (SOC 2, ISO 27001 and others), quoted from its own trust page. APIs.io verifies none of them.

Evidence

1 quoted statement, read from Evidence's own page on 2026-11-09.

COMPLIANCE

FinOps 1

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

Evidence Finops

FINOPS

Security Posture 2

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

Evidence Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Evidence Trust Center

SOC 2

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

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

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Attestations

Attestations

Source (apis.yml)

aid: evidence-dev
url: https://raw.githubusercontent.com/api-evangelist/evidence-dev/refs/heads/main/apis.yml
name: Evidence
kind: company
description: Evidence is an open-source (MIT) business-intelligence-as-code framework that turns SQL queries plus Markdown
  into fast, version-controlled static data apps and dashboards. It is built on Svelte/Vite, runs queries through a DuckDB-WASM
  "Universal SQL" engine, and is consumed as a framework/CLI rather than a hosted REST API. Evidence Cloud adds managed hosting,
  a managed query engine, scheduled data syncs, and AI authoring assistance.
deliveryModel:
  model: open-core
  license: MIT
  license_evidence:
    repo: evidence-dev/evidence
    spdx: MIT
    stars: 6959
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: medium
  source:
  - pricing
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/evidence-dev.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
tags:
- Business Intelligence
- BI-as-Code
- SQL
- Markdown
- Data Apps
- Open Source
tags_raw:
- Business Intelligence
- BI as Code
- SQL
- Markdown
- Data Apps
- Open Source
- Open-Source
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: evidence-dev:evidence-framework
  name: Evidence Framework (SQL + Markdown)
  tags:
  - Framework
  - CLI
  - SQL
  - Markdown
  - Static Sites
  tags_raw:
  - Framework
  - CLI
  - SQL
  - Markdown
  - Static Site
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.evidence.dev/
  properties:
  - url: https://docs.evidence.dev/
    type: Documentation
  - url: https://docs.evidence.dev/reference/cli
    type: APIReference
  - url: https://github.com/evidence-dev/evidence
    type: GitHub
  - url: openapi/_original/evidence-dev-openapi.yml
    type: OpenAPI
  description: The open-source core. SQL statements embedded in Markdown files run against configured data sources and render
    charts and components into a static BI website (Svelte/Vite). The interface is a Node CLI (dev, build, preview, sources)
    plus authored Markdown - not a hosted REST API.
- aid: evidence-dev:usql-query-layer
  name: Evidence USQL / Query Layer
  tags:
  - USQL
  - DuckDB
  - Query Engine
  - Parquet
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://evidence.dev/universal-sql
  properties:
  - url: https://evidence.dev/universal-sql
    type: Documentation
  - url: https://docs.evidence.dev/core-concepts/data-sources/duckdb
    type: APIReference
  - url: https://github.com/evidence-dev/evidence
    type: GitHub
  - url: openapi/_original/evidence-dev-openapi.yml
    type: OpenAPI
  description: Universal SQL, the query engine built into Evidence core and powered by DuckDB's WebAssembly distribution.
    It extracts data sources to Parquet and lets you query across multiple sources with a single SQL dialect via an open data-source-adapter
    standard. Consumed in-process through SQL, not via a network REST endpoint.
- aid: evidence-dev:evidence-cloud
  name: Evidence Cloud
  tags:
  - Cloud
  - Managed Hosting
  - Deployment
  - Artificial Intelligence
  tags_raw:
  - Cloud
  - Managed Hosting
  - Deployment
  - AI
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://evidence.dev/cloud
  properties:
  - url: https://docs.evidence.dev/deployment/evidence-cloud/
    type: Documentation
  - url: https://evidence.dev/pricing
    type: APIReference
  - url: https://github.com/evidence-dev
    type: GitHub
  - url: openapi/_original/evidence-dev-openapi.yml
    type: OpenAPI
  description: The managed hosting and deployment platform for Evidence projects. Adds a managed query engine, multi-level
    caching, row-level security, scheduled data syncs, a browser-based IDE, and AI authoring assistance. Surfaced as a managed
    product/control-plane, not a documented public REST API for end users.
common:
- type: TrustCenter
  url: security/evidence-dev-trust-center.yml
- type: DomainSecurity
  url: security/evidence-dev-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/evidence-dev
- type: LinkedIn
  url: https://www.linkedin.com/company/evidence-dev
- type: Website
  url: https://evidence.dev/
- type: Documentation
  url: https://docs.evidence.dev/
- type: Plans
  url: plans/evidence-dev-plans-pricing.yml
- type: RateLimits
  url: rate-limits/evidence-dev-rate-limits.yml
- type: FinOps
  url: finops/evidence-dev-finops.yml
- type: Blog
  url: https://evidence.dev/blog
- type: Attestations
  url: compliance/evidence-dev-compliance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Evidence API — frequently asked questions

Does Evidence have an API?

Yes. APIs.io lists 3 APIs from Evidence, including Evidence Framework (SQL + Markdown), Evidence USQL / Query Layer and Evidence Cloud.

Is there an OpenAPI specification for the Evidence API?

Yes. APIs.io indexes 3 OpenAPI specifications for Evidence, each linked for download from this page.

How much does the Evidence API cost?

APIs.io lists 5 pricing plans for Evidence, with each plan's price, limits and inclusions under Pricing on this page.

Is the Evidence API ready for AI agents?

Evidence has a Kin Score of 21.0 out of 100 (emerging) and an Agent Readiness score of 13.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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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.
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