DEVELOPER DOCS · LAST UPDATED SEPTEMBER 2026

ACCRUE MCP Server

Model Context Protocol server for AI agents — live yield data, and transactions for the agent’s own wallet.

ACCRUE provides a public Model Context Protocol server that lets any MCP-compatible AI agent work with ACCRUE’s stablecoin yield platform programmatically. Connect Claude, ChatGPT desktop, Cursor, Windsurf, or any other MCP client to read live vault and portfolio data, get recommendations, and prepare deposits and withdrawals.

ACCRUE never signs, never holds keys and never holds funds. Transaction tools return unsigned transactions for the agent’s own wallet to sign, and the agent keeps full control.

Endpoint

https://accrue.cc/mcp

Transport: HTTP (JSON-RPC 2.0)
Protocol Version: 2024-11-05
Authentication: None required

What you can do

Nineteen tools are exposed.

Stablecoin Yield Index (SYX)

• get_syx_value — current SYX value and 7, 30 and 90-day averages
• get_syx_methodology — how the index is weighted and built
• get_syx_components — live per-component APY, TVL and weight
• get_syx_history — historical SYX series

Vaults and portfolios

• list_vaults, get_vault_details, compare_vaults, search_vaults — live APY, TVL, risk and chain for every vault
• list_model_portfolios, get_portfolio_details — the model portfolios and their allocations

Decisions

• recommend_strategy, calculate_yield, get_platform_info, search

Transactions

• list_vault_contracts — the vault contracts on a chain, read live from the ACCRUE Registry
• prepare_transaction — a deposit or withdrawal for the agent’s own wallet, unsigned
• build_user_operation, submit_user_operation, get_transaction_status — the sponsored and USDC-gas paths, below
• get_gas_sponsorship — where a wallet stands in ACCRUE’s gas sponsorship: eligibility, monthly limit, amount used and remaining, reset date

Deposits and withdrawals

prepare_transaction returns up to three ways to carry out the same action. Prefer them in this order:

• Sponsored — ACCRUE pays the network fee, for an eligible agent wallet within its limits: a fixed amount per wallet each month and per transaction (limited trial on Base first). build_user_operation obtains the sponsorship before you sign, so a sponsored answer is confirmed, not promised. If a limit or the monthly budget is reached, you get NOT_SPONSORED and use one of the paths below. Eligibility: an average balance of at least $100 across ACCRUE vaults on the chain over the last 30 days, and a first deposit at least 14 days ago. Status: /api/gas-sponsorship.
• Pay gas in ETH — ordinary transactions sent from the agent’s own address. Always returned. Each is simulated first and carries a gas limit.
• Pay gas in USDC (Base and Ethereum) — one ERC-4337 user operation whose gas Circle’s paymaster takes in USDC, so the agent needs no ETH at all. A one-time EIP-7702 authorisation points the agent’s address at a standard account contract (Simple7702Account); the address does not change. That matters: ACCRUE positions are permanently tied to the address that deposits.

1  prepare_transaction      deposit 25 USDC into acrAAVE on Base, for my address
   ← sponsored_path        ACCRUE pays (+ a one-time EIP-7702 authorisation)
   ← eth_path              plain transactions (gas in ETH)
   ← usdc_path             a USDC permit to sign (+ a one-time EIP-7702 authorisation)
2  build_user_operation     with the draft (and, for USDC, the signed permit)
   ← the user operation to sign
3  submit_user_operation    with the signature
4  get_transaction_status   → success, transaction hash, who paid the fee and how much

The USDC path shows a gas ceiling before anything is signed: the most the operation can cost. Any unused prefund is refunded, and the USDC allowance given to the paymaster is reset to zero in the same operation. If Circle’s paymaster is paused, its fee is above 10%, or the address is already set up by another wallet, only the ETH path is offered, with the reason.

Connect to Claude Desktop

Edit your Claude Desktop config at ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "accrue": {
      "url": "https://accrue.cc/mcp",
      "transport": "http"
    }
  }
}

Restart Claude Desktop. ACCRUE tools will appear in the tool picker.

Connect to Cursor / Windsurf / Zed

Most MCP-compatible editors accept the URL directly through their MCP settings UI. Look for "Add MCP server" and enter https://accrue.cc/mcp as the URL.

Use programmatically

The server speaks standard MCP JSON-RPC. Example: list all vaults.

curl -X POST https://accrue.cc/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "list_vaults",
      "arguments": {}
    }
  }'

Example requests an AI agent might make

• "What’s the highest yield on ACCRUE for a conservative investor?" → recommend_strategy
• "Compare the Aave and Gauntlet Frontier vaults on Base" → compare_vaults
• "If I deposit $10,000 for 12 months, what would I earn?" → calculate_yield
• "Deposit 25 USDC into Aave on Base, paying gas in USDC" → prepare_transaction

Roadmap

• Webhook subscriptions (notify agents when APYs change significantly)

Transaction support stays limited to unsigned transactions for the agent’s own wallet. ACCRUE will never custody funds.

Questions or feedback?

The MCP server is open and free to use. If your AI agent product wants to integrate with ACCRUE at scale, reach us at hello@accrue.cc.

ACCRUE is a non-custodial stablecoin yield platform on Ethereum and Base. accrue.cc