Agent Diff

Agent Diff creates isolated, ephemeral replicas of third-party APIs (Slack, Linear, GitHub). Agents interact with these sandboxes to produce deterministic state-change diffs without side effects, rate limits, or real API calls. Ideal for testing AI agents that interact with external APIs.

Agent Diff publishes 2 APIs on the APIs.io network: Diffs API and Sandboxes API. Tagged areas include API Testing, AI Agents, Sandboxing, API Diffing, and Developer Tools.

The Agent Diff catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Agent Diff’s developer surface includes authentication, developer portal, getting-started guide, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

51.4/100 developing ▬ flat Agent 44/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

2 APIs

API TestingAI AgentsSandboxingAPI DiffingDeveloper Tools

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 51.4/100 · developing

Contract Quality 18.2 / 25

Developer Ergonomics 6.1 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.1 / 13

Governance 8.3 / 12

Discoverability 6.9 / 10

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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

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/agent-diff: 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 2

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

Rate Limits 1

Documented rate limits and quota policies.

Agent Diff Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

JSON Schema 5

Standalone JSON Schema definitions for this provider's data models.

Examples 5

Example request and response payloads for these APIs.

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

JSONSchema

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

JSONLDContext

JSONLDContext

Vocabulary

Vocabulary

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Source (apis.yml)

aid: agent-diff
name: Agent Diff
description: Agent Diff creates isolated, ephemeral replicas of third-party APIs (Slack, Linear, GitHub). Agents interact
  with these sandboxes to produce deterministic state-change diffs without side effects, rate limits, or real API calls. Ideal
  for testing AI agents that interact with external APIs.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/agent-diff.png
tags:
- API Testing
- AI Agents
- Sandboxing
- API Diffing
- Developer Tools
created: '2026-01-02'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: agent-diff:agent-diff-diffs-api
  name: Agent Diff Diffs API
  description: The Diffs API from Agent Diff — 1 operation(s) for diffs.
  humanURL: https://www.agentdiff.dev/
  baseURL: https://api.agentdiff.dev/v1
  tags:
  - Diffs
  properties:
  - type: OpenAPI
    url: openapi/agent-diff-diffs-api-openapi.yml
  - type: Documentation
    url: https://www.agentdiff.dev/
- aid: agent-diff:agent-diff-sandboxes-api
  name: Agent Diff Sandboxes API
  description: The Sandboxes API from Agent Diff — 2 operation(s) for sandboxes.
  humanURL: https://www.agentdiff.dev/
  baseURL: https://api.agentdiff.dev/v1
  tags:
  - Sandboxes
  properties:
  - type: OpenAPI
    url: openapi/agent-diff-sandboxes-api-openapi.yml
  - type: Documentation
    url: https://www.agentdiff.dev/
features:
- Isolated Ephemeral API Sandbox Replicas
- Deterministic State-Change Diff Generation
- No Rate Limits or Side Effects in Sandboxes
- Support for Slack, Linear, and GitHub APIs
- Scenario-Based Seed Data for Reproducible Tests
- TTL-Based Sandbox Expiration
- Diff Tracking for All Agent Operations
useCases:
- AI Agent Integration Testing Against Third-Party APIs
- Regression Testing for Agent Workflows
- Deterministic CI/CD Pipeline Testing for Agents
- Debugging Agent Behavior Without Real API Calls
- Benchmarking Agent Performance Against Known States
integrations:
- Slack API Sandbox
- Linear API Sandbox
- GitHub API Sandbox
- CI/CD Pipeline Integration
- LangChain Agent Testing
- OpenAI Function Calling Testing
common:
- type: AgenticAccess
  url: agentic-access/agent-diff-agentic-access.yml
- type: DomainSecurity
  url: security/agent-diff-domain-security.yml
- type: Authentication
  url: authentication/agent-diff-authentication.yml
- url: https://www.agentdiff.dev/
  type: Portal
- url: https://www.agentdiff.dev/docs
  type: GettingStarted
- url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/rules/agent-diff-spectral-rules.yml
  type: SpectralRules
- url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/json-schema/agent-diff-sandbox-sandbox-schema.json
  type: JSONSchema
- url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/json-schema/agent-diff-sandbox-diff-entry-schema.json
  type: JSONSchema
- url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/json-ld/agent-diff-sandbox-context.jsonld
  type: JSONLDContext
- url: https://raw.githubusercontent.com/api-evangelist/agent-diff/refs/heads/main/vocabulary/agent-diff-vocabulary.yaml
  type: Vocabulary
- type: LlmsText
  url: https://www.agentdiff.dev/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Agent Diff

APIs 2

Open Collections 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Semantic Vocabularies 1

Spectral Rules 2