=nil; Foundation

aid: nil-foundation
name: =nil; Foundation
description: =nil; Foundation is the developer of =nil;, an Ethereum Layer 2 blockchain powered by zkSharding that delivers
  horizontal scalability with built-in cross-shard communication and zero-knowledge proofs. On =nil; all accounts are smart
  contracts (no EOAs), state is partitioned across execution shards, and correctness is verified with zk proofs while Ethereum
  provides data availability and consensus. Developers build with Solidity smart contracts and interact with the cluster through
  an Ethereum-style JSON-RPC 2.0 API, the @nilfoundation/niljs TypeScript client library, the =nil; CLI, and a Hardhat plugin.
  =nil; Foundation also develops zkLLVM (a zero-knowledge proof circuit compiler) and the Placeholder proof system with an
  in-EVM verifier. The company is a portfolio company of Polychain Capital.
url: https://raw.githubusercontent.com/api-evangelist/nil-foundation/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- polychain
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://nil.foundation/favicon.ico
tags:
- Company
- Zk Infrastructure
- Blockchain
- Layer 2
- Ethereum
- Zero-Knowledge Proofs
- zkSharding
- JSON-RPC
- Smart Contracts
- Developer Tools
tags_raw:
- Company
- Zk Infrastructure
- Blockchain
- Layer 2
- Ethereum
- Zero Knowledge Proofs
- zkSharding
- JSON-RPC
- Smart Contracts
- Developer Tools
apis:
- name: =nil; JSON-RPC API
  description: Ethereum-style JSON-RPC 2.0 API exposing the =nil; cluster — blocks, transactions (messages), accounts, contract
    calls, gas pricing, shard enumeration, tokens, and event filters. Read methods require no authentication; state changes
    are authorized by signed raw transactions.
  humanURL: https://docs.nil.foundation/nil/references/json-rpc-api/
  baseURL: https://api.devnet.nil.foundation
  tags:
  - JSON-RPC
  - Blockchain
  - Layer 2
  properties:
  - type: Documentation
    url: https://docs.nil.foundation/nil/references/json-rpc-api/
  - type: Authentication
    url: authentication/nil-foundation-authentication.yml
  - type: Conventions
    url: conventions/nil-foundation-conventions.yml
  - type: Idempotency
    url: conventions/nil-foundation-conventions.yml
  - type: ErrorCatalog
    url: errors/nil-foundation-error-codes.yml
  - type: Conformance
    url: conformance/nil-foundation-conformance.yml
  - type: X-MCPServerCandidate
    url: mcp/nil-foundation-mcp.yml
    note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list
      derived from the published API contracts, not an existing server. The scorer already read the manifest and reported
      mcp_server correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/nil-foundation-domain-security.yml
- type: Website
  url: https://nil.foundation
- type: DeveloperPortal
  url: https://docs.nil.foundation/
- type: Documentation
  url: https://docs.nil.foundation/
- type: APIReference
  url: https://docs.nil.foundation/nil/references/json-rpc-api/
- type: GettingStarted
  url: https://docs.nil.foundation/nil/getting-started/prerequisites/
- type: Blog
  url: https://nil.foundation/blog
- type: GitHubOrganization
  url: https://github.com/NilFoundation
- type: PrivacyPolicy
  url: https://nil.foundation/pages/privacy-policy
- type: SDKs
  url: packages/nil-foundation-packages.yml
- type: Packages
  url: packages/nil-foundation-packages.yml
- type: CLI
  url: cli/nil-foundation-cli.yml
- type: X-MCPServerCandidate
  url: mcp/nil-foundation-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/nil-foundation-llms.txt
- type: Authentication
  url: authentication/nil-foundation-authentication.yml
- type: Conventions
  url: conventions/nil-foundation-conventions.yml
- type: Idempotency
  url: conventions/nil-foundation-conventions.yml
- type: ErrorCatalog
  url: errors/nil-foundation-error-codes.yml
- type: Conformance
  url: conformance/nil-foundation-conformance.yml
- type: Lifecycle
  url: lifecycle/nil-foundation-lifecycle.yml
- type: Deprecation
  url: https://docs.nil.foundation/nil/migration-guides/
- type: ChangeLog
  url: changelog/nil-foundation-changelog.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 11
  pass: local-v1