Mezo

Mezo is Bitcoin's economic layer — a Cosmos SDK-based appchain with full EVM compatibility, built by Thesis (creators of tBTC, Fold, and Taho). It lets Bitcoiners borrow, lend, spend, save, and earn yield without selling their BTC: BTC is used natively for gas, tBTC provides reliable bridging, and MUSD is a Bitcoin-backed stablecoin pegged 1:1 to the U.S. dollar. The chain runs the mezod reference client (forked from Evmos) on CometBFT consensus with a dual-staking model, and exposes Ethereum JSON-RPC, Cosmos REST/gRPC + CometBFT RPC, and a Blockscout explorer API. Developers deploy Solidity contracts with Hardhat or Foundry against mainnet EVM chain ID 31612 and testnet 31611, and can accept MUSD payments over the x402 (HTTP 402) protocol.

Mezo publishes 2 APIs on the APIs.io network. Tagged areas include Company, Crypto Web3, Blockchain, Bitcoin, and DeFi.

Mezo’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, CLI, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub
33.1/100 thin Agent 7/100 human only Full breakdown ↓
scored 2026-07-21 · rubric v0.4
2 APIs 0 Features
CompanyCrypto Web3BlockchainBitcoinDeFiEVMCosmos SDKStablecoinJSON-RPCLayer 2

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-21 · rubric v0.4
Composite quality — 33.1/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 10.9 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 6.2 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 7/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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 4 / 4
Consent & Bot Identity 3 / 3
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/mezo: 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

Mezo Chain EVM JSON-RPC

EVM-compatible Ethereum JSON-RPC interface to the Mezo chain (eth_* methods) for reading chain state and submitting transactions. Mainnet EVM chain ID 31612, testnet 31611; BTC ...

Mezo Block Explorer API

Blockscout REST + JSON-RPC API for the Mezo chain explorer — blocks, transactions, addresses, tokens, and verified smart-contract data.

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 LLMsTxt
LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conventions
Conventions
 Conformance
Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 4

Authentication, authorization, and security posture

SecurityTxt
SecurityTxt
 DomainSecurity
DomainSecurity
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security

Operate 3

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 ChangeLog
ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Explorer
Explorer

Source (apis.yml)

apis.yml Raw ↑ 
aid: mezo
name: Mezo
description: 'Mezo is Bitcoin''s economic layer — a Cosmos SDK-based appchain with full EVM compatibility, built by Thesis
  (creators of tBTC, Fold, and Taho). It lets Bitcoiners borrow, lend, spend, save, and earn yield without selling their BTC:
  BTC is used natively for gas, tBTC provides reliable bridging, and MUSD is a Bitcoin-backed stablecoin pegged 1:1 to the
  U.S. dollar. The chain runs the mezod reference client (forked from Evmos) on CometBFT consensus with a dual-staking model,
  and exposes Ethereum JSON-RPC, Cosmos REST/gRPC + CometBFT RPC, and a Blockscout explorer API. Developers deploy Solidity
  contracts with Hardhat or Foundry against mainnet EVM chain ID 31612 and testnet 31611, and can accept MUSD payments over
  the x402 (HTTP 402) protocol.'
url: https://raw.githubusercontent.com/api-evangelist/mezo/refs/heads/main/apis.yml
image: https://avatars.githubusercontent.com/u/175807022?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- multicoin-capital
- pantera-capital
x-tier: profiled
x-tier-reason: enriched-local-v1
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Crypto Web3
- Blockchain
- Bitcoin
- DeFi
- EVM
- Cosmos SDK
- Stablecoin
- JSON-RPC
- Layer 2
apis:
- name: Mezo Chain EVM JSON-RPC
  description: EVM-compatible Ethereum JSON-RPC interface to the Mezo chain (eth_* methods) for reading chain state and submitting
    transactions. Mainnet EVM chain ID 31612, testnet 31611; BTC is the native gas token (18 decimals). Deploy with Hardhat
    or Foundry.
  humanURL: https://mezo.org/docs/developers/getting-started/configure-environment/
  baseURL: https://rpc.test.mezo.org
  tags:
  - Blockchain
  - EVM
  - JSON-RPC
  - Bitcoin
  properties:
  - type: Documentation
    url: https://mezo.org/docs/developers/getting-started/configure-environment/
  - type: GettingStarted
    url: https://mezo.org/docs/developers/getting-started/
- name: Mezo Block Explorer API
  description: Blockscout REST + JSON-RPC API for the Mezo chain explorer — blocks, transactions, addresses, tokens, and verified
    smart-contract data.
  humanURL: https://explorer.mezo.org/
  baseURL: https://explorer.mezo.org
  tags:
  - Blockchain
  - Explorer
  properties:
  - type: Documentation
    url: https://docs.blockscout.com/devs/apis
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://mezo.org
- type: DeveloperPortal
  url: https://mezo.org/docs
- type: Documentation
  url: https://mezo.org/docs
- type: APIReference
  url: https://mezo.org/docs/developers/getting-started/configure-environment/
- type: GettingStarted
  url: https://mezo.org/docs/developers/getting-started/
- type: Support
  url: https://discord.com/invite/mezo
- type: Blog
  url: https://mezo.org/blog
- type: GitHubOrganization
  url: https://github.com/mezo-org
- type: TermsOfService
  url: https://mezo.org/legal/terms
- type: PrivacyPolicy
  url: https://mezo.org/legal/privacy
- type: SignUp
  url: https://mezo.org/explore
- type: StatusPage
  url: https://monitoring.mezo.org/grafana/public-dashboards/ce8d1e04916244b0908cb967b8530f5f
- type: Explorer
  url: https://explorer.mezo.org
- type: WellKnown
  url: well-known/mezo-well-known.yml
- type: SecurityTxt
  url: well-known/mezo-security.txt
- type: DomainSecurity
  url: security/mezo-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/mezo-vulnerability-disclosure.yml
- type: Security
  url: https://mezo.org/SECURITY.md
- type: Packages
  url: packages/mezo-packages.yml
- type: SDKs
  url: packages/mezo-packages.yml
- type: CLI
  url: cli/mezo-cli.yml
- type: LLMsTxt
  url: llms/mezo-llms.txt
- type: Lifecycle
  url: lifecycle/mezo-lifecycle.yml
- type: Conventions
  url: conventions/mezo-conventions.yml
- type: Conformance
  url: conformance/mezo-conformance.yml
- type: ChangeLog
  url: changelog/mezo-changelog.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 11
  pass: local-v1