Cypherium

Cypherium is a permissionless Layer-1 blockchain built to bridge centralized (CeFi) and decentralized (DeFi) finance and bring real-world assets on-chain at scale. It runs CypherBFT, a hybrid consensus that pairs GPU proof-of-work committee election with HotStuff Byzantine Fault Tolerance for near-instant finality, and is EVM/Solidity compatible (EVM chain ID 16166). Products include CypherLink (cross-ledger notary), Cypherium Connect (bank integration plugin, marketed as ISO 20022 compliant), the Cypherium Validator, and Cypherium ID (decentralized identity). Developers integrate through an Ethereum-style JSON-RPC node API (eth/web3/net/ personal/miner/txpool/admin namespaces over HTTP, WS and IPC) and a Coinbase Rosetta API implementation for exchange and wallet integration. Surfaced as a portfolio company of Pantera Capital and enriched into the API Evangelist network.

Cypherium is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Crypto, Blockchain, Layer 1, and JSON-RPC.

Cypherium’s developer surface includes documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.9/100 emerging ▬ flat Agent 0/100 human only Front door AI 3/6 light library Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 APIs

Company Crypto Blockchain Layer 1 JSON-RPC EVM DeFiRosettaConsensus

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 12.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 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 0 / 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

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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 github.com/api-evangelist/cypherium: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

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.

JSON RPC

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

APIs 2

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

Cypherium JSON-RPC API

Ethereum-compatible JSON-RPC node API for the Cypherium Layer-1 mainnet — eth, web3, net, personal, miner, txpool and admin namespaces over HTTP, WebSocket and IPC. EVM chain ID...

Rosetta Cypherium API

Coinbase Rosetta API (Data + Construction) reference implementation for Cypherium, enabling standardized blockchain data access and stateless offline transaction construction fo...

Security Posture 1

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

Cypherium Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 3

The organization behind the API

BlogRSS

BlogRSS

Website

Website

Blog

Blog

Source (apis.yml)

aid: cypherium
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: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cypherium.png
name: Cypherium
description: Cypherium is a permissionless Layer-1 blockchain built to bridge centralized (CeFi) and decentralized (DeFi)
  finance and bring real-world assets on-chain at scale. It runs CypherBFT, a hybrid consensus that pairs GPU proof-of-work
  committee election with HotStuff Byzantine Fault Tolerance for near-instant finality, and is EVM/Solidity compatible (EVM
  chain ID 16166). Products include CypherLink (cross-ledger notary), Cypherium Connect (bank integration plugin, marketed
  as ISO 20022 compliant), the Cypherium Validator, and Cypherium ID (decentralized identity). Developers integrate through
  an Ethereum-style JSON-RPC node API (eth/web3/net/ personal/miner/txpool/admin namespaces over HTTP, WS and IPC) and a Coinbase
  Rosetta API implementation for exchange and wallet integration. Surfaced as a portfolio company of Pantera Capital and enriched
  into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/cypherium/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Crypto
- Blockchain
- Layer 1
- JSON-RPC
- EVM
- DeFi
- Rosetta
- Consensus
apis:
- name: Cypherium JSON-RPC API
  description: Ethereum-compatible JSON-RPC node API for the Cypherium Layer-1 mainnet — eth, web3, net, personal, miner,
    txpool and admin namespaces over HTTP, WebSocket and IPC. EVM chain ID 16166, native currency CPH.
  humanURL: https://github.com/cypherium/cypher
  baseURL: https://pubnodes.cypherium.io/rpc
  tags:
  - JSON-RPC
  - EVM
  - Blockchain
  properties:
  - type: Documentation
    url: https://github.com/cypherium/cypher
  - type: BlockExplorer
    url: https://cypherium.tryethernal.com/
- name: Rosetta Cypherium API
  description: Coinbase Rosetta API (Data + Construction) reference implementation for Cypherium, enabling standardized blockchain
    data access and stateless offline transaction construction for exchanges and wallets.
  humanURL: https://github.com/cypherium/rosetta-cypherium
  baseURL: https://github.com/cypherium/rosetta-cypherium
  tags:
  - Rosetta
  - Blockchain
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.cypherium.io/blog-feed.xml
  type: BlogRSS
- type: Website
  url: https://www.cypherium.io/
- type: GitHubOrganization
  url: https://github.com/cypherium
- type: Documentation
  url: https://github.com/cypherium/cypher
- type: Blog
  url: https://www.cypherium.io/blog
- type: Packages
  url: packages/cypherium-packages.yml
- type: SDKs
  url: packages/cypherium-packages.yml
- type: Conformance
  url: conformance/cypherium-conformance.yml
- type: DomainSecurity
  url: security/cypherium-domain-security.yml
- type: LLMsTxt
  url: llms/cypherium-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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