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For the complete documentation index, see llms.txt. This page is also available as Markdown.

Developers

Endpoints, contracts and tools for building on Libre — including an MCP server that exposes the whole protocol to AI agents.

Libre is an Antelope (formerly EOSIO) chain. Any Antelope tooling works: WharfKit, eosjs, cleos, pyntelope. Accounts use standard Antelope key pairs, and state is read with POST /v1/chain/get_table_rows.

Endpoints

Mainnet
Testnet

Chain API + Hyperion history

https://api.libre.cryptobloks.io

https://api.testnet.libre.cryptobloks.io

Alternate API

https://lb.libre.org

https://testnet.libre.org

Explorer

libreblocks.io

testnet.libreblocks.io

Mainnet chain id: 38b1d7815474d0c60683ecbea321d723e83f5da6ae5f1c1f9fecc69d9ba96465 Testnet chain id: b64646740308df2ee06c6b72f34c0f7fa066d940e831f752db2006fcc2b78dee

Contracts

Contract
What it does

loan

Lending pools, vaults, borrowing, liquidation

oracle

BTC/USD price — averaged across independent feeders

dex.libre

On-chain orderbook DEX

usdt.libre

USDT token (8 dp)

btc.libre

BTC token (8 dp)

tp.libre

TPF lending-pool shares (8 dp)

cbtc.libre

Vault collateral (8 dp)

eosio.token

LIBRE (4 dp)

v.libre / x.libre / t.libre

Bitcoin vault, wrapped BTC, and USDT bridges

Useful tables: poolstats, poolratecfg, globalparams and loanqueue on loan; aggfeeds and feeders on oracle; pairs2, orderbook2 and history2 on dex.libre.

The quickest path: the MCP server

mcp.libre.org exposes every read and transaction-composing operation as a typed tool, over MCP or plain HTTP. It saves you hand-building table queries and transfer memos, and it holds no keys.

→ MCP server

The BTC price

Take it from the oracle contract's aggfeeds table — the average of a round of at least three independent feeders agreeing within 10%, and the exact price the loan contract uses for LTV and liquidation. It is invalid past five minutes, and the contract refuses to act on a stale one.

Do not substitute an exchange price for collateral math. External feeds that appear elsewhere in Libre's infrastructure are reference prices, not the chain's price.

→ How the oracle works

Acting on the chain

Most protocol actions are triggered by sending a token transfer with a structured memo, rather than by calling a named action:

  • Lend: usdt.libre::transfer to loan, memo pool:6

  • Redeem: tp.libre::transfer to loan, memo pool:6

  • Repay: usdt.libre::transfer to loan, memo payback:<account>

  • Place a DEX order: transfer to dex.libre with memo buy:<baseAsset>:<priceAsset>

Vault and loan operations are ordinary actions: loan::createvault, loan::genaddr, loan::borrowvar, loan::withdraw.

The MCP server composes all of these for you, unsigned, if you'd rather not build memos by hand.

Writing contracts

Libre runs standard Antelope C++ contracts built with the Antelope CDT — nothing Libre-specific about the toolchain.

Reference

PreviousTokenomics & TP Value
NextMCP Server

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