Immunefi

Immunefi is a crowdsourced web3 security platform that operates the largest onchain bug bounty ecosystem, connecting security researchers with blockchain protocols and rewarding them for responsibly disclosed vulnerabilities. Alongside bug bounties it runs audit competitions and attackathons, PR reviews, Safe Harbor agreements, onchain monitoring, and Magnus, a unified security command center. Immunefi authors and versions the Immunefi Vulnerability Severity Classification System, the severity taxonomy most web3 bounty programs are written against. Its only public machine-readable surface is an unauthenticated JSON endpoint at immunefi.com/public-api/bounties.json that returns the full catalog of live bug bounty programs, including assets in scope, reward tables by severity, impacts, ecosystems and program metadata.

Immunefi publishes 1 API on the APIs.io network. Tagged areas include Company, Security, Bug Bounty, Vulnerability Disclosure, and Web3.

The Immunefi catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Immunefi’s developer surface includes engineering blog, support, signup flow, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.1/100 thin ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

1 APIs

Company Security Bug Bounty Vulnerability Disclosure Web3 Blockchain Smart Contracts Application Security CryptocurrencyCrowdsourced Security

Kin Score

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

Composite quality — 29.1/100 · thin

Contract Quality 10.7 / 25

Developer Ergonomics 1.4 / 20

Access Clarity 6.8 / 20

Operational Transparency 2.7 / 13

Contract Governance 0.5 / 12

Discoverability 6.9 / 10

Agent readiness — 20/100 · 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 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 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/immunefi: 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 1

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

Rate Limits 1

Documented rate limits and quota policies.

Examples 1

Example request and response payloads for these APIs.

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Webhooks

Conformance

Conventions

Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 3

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

Source (apis.yml)

aid: immunefi
name: Immunefi
description: Immunefi is a crowdsourced web3 security platform that operates the largest onchain bug bounty ecosystem, connecting
  security researchers with blockchain protocols and rewarding them for responsibly disclosed vulnerabilities. Alongside bug
  bounties it runs audit competitions and attackathons, PR reviews, Safe Harbor agreements, onchain monitoring, and Magnus,
  a unified security command center. Immunefi authors and versions the Immunefi Vulnerability Severity Classification System,
  the severity taxonomy most web3 bounty programs are written against. Its only public machine-readable surface is an unauthenticated
  JSON endpoint at immunefi.com/public-api/bounties.json that returns the full catalog of live bug bounty programs, including
  assets in scope, reward tables by severity, impacts, ecosystems and program metadata.
image: https://images.ctfassets.net/t3wqy70tc3bv/1XjTFUMSo1pLNrTF0aIH4U/353cf547e2cd9dcfc4e464ce9c328c07/Logo_square.png
url: https://raw.githubusercontent.com/api-evangelist/immunefi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-23'
modified: '2026-08-23'
tags:
- Company
- Security
- Bug Bounty
- Vulnerability Disclosure
- Web3
- Blockchain
- Smart Contracts
- Application Security
- Cryptocurrency
- Crowdsourced Security
apis:
- aid: immunefi:bounties
  name: Immunefi Bug Bounty Programs API
  description: An unauthenticated, read-only JSON endpoint published on Immunefi's own domain that returns the complete catalog
    of bug bounty programs listed on the platform. Each record carries the project name and slug, program and product type,
    ecosystems, languages, maximum bounty, reward token, KYC and invite-only flags, launch and update dates, the full assets-in-scope
    list, the reward table keyed by severity and asset type, prioritized and out-of-scope impacts, program overview and rules
    prose, and any linked audits. The route serves the entire collection as a single JSON array; there is no filtering, pagination,
    or per-program path.
  humanURL: https://immunefi.com/bug-bounty/
  baseURL: https://immunefi.com/public-api
  tags:
  - Bug Bounty
  - Security
  - Web3
  properties:
  - type: Examples
    url: examples/immunefi-bounty-program-example.json
  - type: DataModel
    url: data-model/immunefi-data-model.yml
  - type: Authentication
    url: authentication/immunefi-authentication.yml
  - type: RateLimits
    url: rate-limits/immunefi-rate-limits.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://immunefi.com/
- type: Blog
  url: https://immunefi.com/blog/
- type: BlogRSS
  url: https://immunefi.com/blog/feed
- type: GitHubOrganization
  url: https://github.com/immunefi-team
- type: Support
  url: https://immunefisupport.zendesk.com/hc/en-us
- type: TermsOfService
  url: https://immunefi.com/terms-of-use/
- type: PrivacyPolicy
  url: https://immunefi.com/privacy-policy/
- type: SignUp
  url: https://bugs.immunefi.com/
- type: Security
  url: https://immunefi.com/bug-bounty/immunefi/
- type: VulnerabilityDisclosure
  url: security/immunefi-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/immunefi-domain-security.yml
- type: Webhooks
  url: asyncapi/immunefi-webhooks.yml
- type: Conformance
  url: conformance/immunefi-conformance.yml
- type: Conventions
  url: conventions/immunefi-conventions.yml
- type: Lifecycle
  url: lifecycle/immunefi-lifecycle.yml
- type: Packages
  url: packages/immunefi-packages.yml
- type: Plans
  url: plans/immunefi-plans-pricing.yml
- type: LLMsTxt
  url: llms/immunefi-llms.txt
x-enrichment:
  date: '2026-08-23'
  status: enriched
  artifacts_added: 17
  pass: local-v1

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Immunefi

Kin Score

APIs 1

Immunefi Bug Bounty Programs API

Pricing Plans 1

Immunefi Plans Pricing

Rate Limits 1

Immunefi Rate Limits

Event Specifications 1

Immunefi Webhooks