Kadena

aid: kadena
name: Kadena
description: 'Kadena was a layer-1 Proof-of-Work blockchain platform built around Chainweb, a braided, parallelized Nakamoto-consensus
  protocol that scales Bitcoin-style security across many chains for high transaction throughput, together with Pact, its
  human-readable, Turing-incomplete smart-contract language. Kadena exposed two primary public APIs: the Chainweb Node API
  (P2P and service endpoints for cuts, blocks, headers, payloads, the mempool, mining, and node info) and the Pact REST API
  (local, send, poll, listen, spv) for submitting and querying smart-contract transactions on mainnet and testnet. The developer
  surface includes the kadena.js TypeScript client libraries, the pactjs CLI for type generation, and extensive docs at docs.kadena.io.
  Kadena Eco supported an ecosystem of dApps, the Marmalade NFT standard, and tooling. NOTE: Kadena the company announced
  it would cease operations on 2025-10-21; Kadena Mainnet stopped producing blocks on 2025-11-15 and the kadena-io GitHub
  organization was archived on 2025-12-23. A community edition (kda-community) forked from mainnet on 2025-11-08 and continues
  the open-source protocol. This profile documents the public API surface as published.'
url: https://raw.githubusercontent.com/api-evangelist/kadena/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
x-tier: stub
x-tier-reason: portfolio-lead
x-status: ceased-operations
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
image: https://cdn.sanity.io/images/agrhq0bu/production/73f06e78e066f86e21cb84f82292494fe04b9be8-1438x472.png
tags:
- Company
- Crypto Web3
- Blockchain
- Smart Contracts
- Proof of Work
- Layer 1
- Web3
- Cryptocurrency
- Developer Tools
- Decentralized
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Kadena Chainweb Node API
  description: The Chainweb Node API of chainweb-node — the REST/service and P2P API for Kadena's Proof-of-Work parallel-chain
    network. Endpoints cover the current cut, block hashes, blocks, headers, payloads (with and without outputs), the mempool
    (getPending, member, lookup, insert), mining work (work, solved, updates), backups, health-check, node info/config, and
    Server-Sent Event streams for block and header updates.
  humanURL: https://docs.kadena.io/api/chainweb-api
  baseURL: https://api.chainweb.com/chainweb/0.0/mainnet01
  image: https://cdn.sanity.io/images/agrhq0bu/production/73f06e78e066f86e21cb84f82292494fe04b9be8-1438x472.png
  properties:
  - type: OpenAPI
    url: openapi/kadena-chainweb-openapi-original.yml
  - type: APIReference
    url: https://kadena-io.github.io/chainweb-openapi/
  tags:
  - Blockchain
  - Chainweb
  - Proof of Work
  - Node API
- name: Kadena Pact REST API
  description: 'The Pact REST API — the transactional API for a runtime offering Pact smart contracts on a Chainweb chain.
    Endpoints: /local (non-transactional execution and preflight), /send (submit signed commands), /poll and /listen (retrieve
    results by request key), /private (private transactions), and /spv (simple payment verification proofs).'
  humanURL: https://docs.kadena.io/api/pact-api
  baseURL: https://api.chainweb.com/chainweb/0.0/mainnet01/chain/0/pact/api/v1
  image: https://cdn.sanity.io/images/agrhq0bu/production/73f06e78e066f86e21cb84f82292494fe04b9be8-1438x472.png
  properties:
  - type: OpenAPI
    url: openapi/kadena-pact-openapi-original.yml
  - type: APIReference
    url: https://kadena-io.github.io/chainweb-openapi/
  tags:
  - Smart Contracts
  - Pact
  - Transactions
common:
- type: AgenticAccess
  url: agentic-access/kadena-agentic-access.yml
- type: DomainSecurity
  url: security/kadena-domain-security.yml
- type: Website
  url: https://kadena.io
- type: DeveloperPortal
  url: https://docs.kadena.io
- type: Documentation
  url: https://docs.kadena.io
- type: APIReference
  url: https://kadena-io.github.io/chainweb-openapi/
- type: GettingStarted
  url: https://docs.kadena.io/build/quickstart
- type: Blog
  url: https://medium.com/kadena-io
- type: GitHubOrganization
  url: https://github.com/kadena-io
- type: ChangeLog
  url: https://docs.kadena.io/changelogs/chainweb-node
- type: ChangeLog
  name: Kadena changelog artifact
  url: changelog/kadena-changelog.yml
- type: Packages
  url: packages/kadena-packages.yml
- type: SDKs
  url: packages/kadena-packages.yml
- type: CLI
  url: cli/kadena-cli.yml
- type: MCPServer
  url: mcp/kadena-mcp.yml
- type: LLMsTxt
  url: llms/kadena-llms.txt
- type: Overlay
  name: Chainweb Node API overlay
  url: overlays/kadena-chainweb-overlay.yaml
- type: Overlay
  name: Pact REST API overlay
  url: overlays/kadena-pact-overlay.yaml
- type: Conformance
  url: conformance/kadena-conformance.yml
- type: ErrorCatalog
  url: errors/kadena-problem-types.yml
- type: Lifecycle
  url: lifecycle/kadena-lifecycle.yml
- type: Conventions
  url: conventions/kadena-conventions.yml
- type: Sandbox
  url: sandbox/kadena-sandbox.yml
- type: DataModel
  url: data-model/kadena-data-model.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence