# Krexa

> Krexa is the financial OS for AI agents — programmable credit infrastructure on Solana and Monad. AI agents register on-chain, get a Krexit Score (200–850), receive a PDA-based credit wallet, borrow USDC against their score, and repay automatically through the Revenue Router. No human co-signer required.

Krexa is live and multi-chain: seven Anchor programs on Solana mainnet and ten contracts on Monad mainnet (chain 143) power agent identity, credit underwriting, payment routing, and vault liquidity. AI agents integrate via CLI (`npx @krexa/cli`), MCP server (22 tools for Claude Code / Cursor), TypeScript SDK (`@krexa/sdk`), or by pasting `/skill.md` into any agent's prompt.

Credit levels: L1 Micro ($500 @ 36.50% APR), L2 Standard ($20K @ 29.20%, score 500+), L3 Growth ($50K @ 21.90%, score 650+ & KYA Tier 2), L4 Prime ($500K @ 18.25%, score 750+ & KYA Tier 2). Full schedule: /pricing.md.

## Core docs

- [Agent skill profile (Markdown)](https://www.krexa.xyz/skill.md): Self-contained guide for any LLM/agent — quickstart, concepts, programs, API, MCP tools, x402 integration. The fastest way to teach an agent what Krexa is and how to use it.
- [Pricing & credit levels (Markdown)](https://www.krexa.xyz/pricing.md): Machine-readable credit levels (L1–L4), APRs, LP tranche yields, and protocol fee.
- [GitHub — Yatharth4599/Krexa](https://github.com/Yatharth4599/Krexa): Source code — Anchor programs, backend (Express + Prisma), frontend (React + Vite), oracle daemon, MCP server, CLI, SDK.

## App entry points

- [Landing](https://www.krexa.xyz/): Overview, integration paths (CLI / Skill / MCP), partner logos.
- [Developers](https://www.krexa.xyz/developers): Integration guide for engineers building agents on Krexa.
- [What is a Krexit Score](https://www.krexa.xyz/score): Explainer — how the 200–850 on-chain agent credit score is computed.
- [AI Agents](https://www.krexa.xyz/agents): Agent types (A trader / B service / C hybrid), lifecycle, anti-fraud layers.
- [Lenders / LPs](https://www.krexa.xyz/lenders): How liquidity providers earn tranched yield funding agent credit.
- [Analytics](https://www.krexa.xyz/analytics): Live on-chain protocol metrics — credit issued, active agents, repayment rate, TVL.
- [Score Lookup](https://www.krexa.xyz/agent): Look up the Krexit Score of any Solana wallet (registered or preview).
- [Dashboard](https://www.krexa.xyz/dashboard): Connected-wallet view of agent profile, credit line, repayments.
- [Credit (Solana)](https://www.krexa.xyz/app/solana/credit): Deposit collateral, request credit, repay.
- [Vault (Solana)](https://www.krexa.xyz/app/solana/vault): Vault config, utilisation, tranche stats.
- [LP (Solana)](https://www.krexa.xyz/app/solana/lp): Liquidity provider deposit/withdraw across senior/mezzanine/junior tranches.
- [Credit (Monad)](https://www.krexa.xyz/app/monad/credit): Agent credit on Monad mainnet (chain 143).
- [Score (Monad)](https://www.krexa.xyz/app/monad/score): Krexit Score on Monad.
- [Vault (Monad)](https://www.krexa.xyz/app/monad/vault): Credit vault liquidity on Monad.
- [Paysh](https://www.krexa.xyz/paysh): x402 service monetization — agents earn from API calls, revenue auto-repays credit.
- [Copy Trading](https://www.krexa.xyz/copy-trading): Build a copy-trading agent powered by Krexa credit.
- [KYA](https://www.krexa.xyz/kya): Know-Your-Agent verification (Sumsub-backed).

## API

- Base: `https://tcredit-backend.onrender.com/api/v1`
- `GET /solana/score/:agent` — Krexit Score for any Solana wallet (on-chain if registered, preview otherwise).
- `POST /solana/oracle/sign-credit` — Oracle partial-signs the `request_credit` transaction.
- `GET /solana/vault` — Vault config, utilisation, tranche stats.
- `GET /solana/wallets/:agent` — Agent wallet state.
- `GET /solana/credit/:agent/eligibility` — Eligibility check.

## On-chain programs (Solana mainnet)

- Agent Registry — `EnteGjokMnFqTDcZSBitXDQEctMCnqV33HbPKw2LnDCg`
- Credit Vault — `LgrUXRquid228Azj2HrMNLhXHFw8FDRGVG1SqLbbcMS`
- Agent Wallet — `FZoibjoRvbSTqR46XfKkkX6ZLRugZvGoV82NJBatt5fu`
- Payment Router — `Hx1fkePyNggZDjL4mwVWYyd3K3vqg7iWAEtb5xuGBHVL`
- Venue Whitelist — `BuutifX7Wj8ysKeLQt1pag3JYWQdZHjktCA6ePUfHFHs`

## Optional

- [llms-full.txt](https://www.krexa.xyz/llms-full.txt): Full long-form content for LLM retrieval — extended concept docs, complete API spec, MCP tool inventory, x402 patterns.
- [X / Twitter](https://x.com/krexa_xyz): @krexa_xyz — protocol updates.