Beta

This section is currently in development and may change.

MCP Server

Sei Agent Kit

MCP toolkit for the Sei blockchain — dual-stack EVM + Cosmos. Send transactions, stake, IBC, inspect on-chain data, deploy & verify contracts — from AI agents or the terminal.

GitHub

MCP151 toolsEVM + Cosmos

Endpointapi.seistream.app/mcp

Two ways to use

Subscription

Free

Connect MCP to Claude Code, Cursor, or Codex and use your existing subscription. No API key needed.

Claude Code auto-detects .mcp.json
Built-in /wallet, /send, /stake, /ibc, /deploy skills
Works with Claude Pro/Max or Cursor Pro

Claude Code setup

Cursor setup

Codex setup

AI SDK

Developers

Build programmatic agents via Vercel AI SDK with Claude or OpenAI. Full control over agent behavior.

Vercel AI SDK integration
Claude and OpenAI support
Ready-to-run demos included

AI SDK docs

Quick Start

# Clone
git clone https://github.com/stakeme-team/sei-agent-kit
cd sei-agent-kit

# Install (in Docker for safety)
docker run --rm --network host -v "$(pwd):/app" -w /app node:20-alpine npm install

# Create wallet
npx tsx scripts/wallet-manager.ts generate --simple

# Open Claude Code
claude

Claude Code auto-detects .mcp.json and connects to Sei. Use built-in skills:

/wallet    — Show EVM + Cosmos addresses and balances
/send      — Send SEI (EVM 0x... or Cosmos sei...)
/stake     — Delegate SEI to a validator (Cosmos-native)
/ibc       — IBC-transfer SEI to another Cosmos chain
/deploy    — Deploy and verify an EVM contract

# Or just chat:
"Delegate 1 SEI to the validator with the lowest commission"

Architecture

The AI agent sees only your wallet address and tool results — never the private key. Signing always happens locally before the transaction is broadcast.

unix

AI Agent (Claude/GPT/ local)

✓ Sees: wallet address, tool results✗ Never sees: private key

Security

Key Principle

The private key never leaves your machine. MCP prepares unsigned transactions, signing happens locally, then the signed transaction is broadcast back through MCP.

Simple Mode

Default

Private key stored in .env, protected by guard hooks that block the AI agent from reading it. Tests cover 29 attack vectors.

npx tsx scripts/wallet-manager.ts generate --simple

# Verify guard (blocks 29 attack vectors):
npm run security-test
# ✓ cat .env           → BLOCKED
# ✓ grep PRIVATE .env  → BLOCKED
# ✓ echo $PRIVATE_KEY  → BLOCKED
# ✓ python3 read .env  → BLOCKED
# ... 29/29 passed ✓

Secure Mode

Maximum security

Private key encrypted in keystore, decrypted only in a separate daemon process. The AI agent physically cannot access the key — it only receives the signed hash.

# Create encrypted wallet
npx tsx scripts/wallet-manager.ts generate --secure

# Start daemon (separate terminal)
npx tsx scripts/signer-daemon.ts
# Unlock password: ********
# ✓ Signer ready: 0x742d...
# ✓ Socket: /tmp/sei-signer.sock

# Manual approval mode (agent waits for you):
npx tsx scripts/signer-daemon.ts --manual

Docker Isolation

Supply chain protection

Run all npm installs and demos inside a container. Node modules are isolated — compromised packages can't reach your host filesystem or keys.

# Install deps in isolated container
docker compose run --rm install

# Run demos in container
docker compose run --rm dev npx tsx examples/01-wallet-and-balances.ts

# Signer daemon with NO network access
docker compose up signer

MCP Tools

151 tools total

The Sei MCP server at https://api.seistream.app/mcp exposes 151 tools across both the EVM and Cosmos stacks.

EVM · Transactions

prepare_native_transfer
prepare_erc20_transfer
prepare_contract_write
broadcast_signed_raw_transaction
wait_for_transaction

EVM · Accounts & Tokens

get_balance
get_token_balance
get_evm_account_by_address
list_erc20_tokens

EVM · Contracts

read_evm_contract
get_evm_contract_code
verify_evm_contract_standard_json

Cosmos · Staking

cosmos_prepare_delegate
list_cosmos_validators
get_cosmos_account_delegations
get_cosmos_account_rewards

Cosmos · Transfers & IBC

cosmos_prepare_send
cosmos_prepare_ibc_transfer
cosmos_broadcast_signed_tx

Cosmos · Governance

list_cosmos_proposals
get_cosmos_proposal_by_id
get_cosmos_account_votes

Sei-specific

get_pointer_mapping
explorer_search
get_chain_network