AssetFare USDC Bridge

Non-custodial USDC bridge and cross-chain swap quotes: Solana to Base; unsigned, never signs/submits

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Non-custodial USDC bridge and cross-chain swap quotes: Solana to Base; unsigned, never signs/submits

    How to connect

    How to connect AssetFare USDC Bridge to Claude

    The server address to paste into Claude settings:

    https://api.assetfare.dev/mcp/bridge

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect AssetFare USDC Bridge to ChatGPT

    The server address to paste into ChatGPT settings:

    https://api.assetfare.dev/mcp/bridge

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect AssetFare USDC Bridge to Cursor

    The server address to paste into Cursor settings:

    https://api.assetfare.dev/mcp/bridge

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (11)

    Raw names from tools/list. Only developers need these.

    assetfare_manifestRead the Ed25519-signed release manifest and safety-bundle binding before preparing an action. Example: call this once to verify the current release and contract pins; it never creates state, signs, or submits.
    assetfare_v2_capabilitiesRead all 100 technically available routes, live provider readiness, route-specific guidance, direct_route_summary, and continuation_v3 contracts before quoting. Forty-four routes are price-recommended only at or above their published threshold; 56 have no current price recommendation. Example: call once before requesting an exact route quote. Confirm every fresh quote. Economic guidance is advisory and never adds an execution gate. continuation_v3 separately binds execution selection, wallets, bounds, and mode. Read-only; creates no wallet login, session, or action.
    assetfare_v2_route_selectionQuote the recent top two plus the best AssetFare graph at the exact amount; return up to two all-in choices labeled assetfare_verified_unsigned or external_provider_handoff. AssetFare cost, ETA and rank are always present; a recent winning range needs two supporting higher buckets and disappears on conflict. Example: compare Solana USDC to Base USDC at USD 347.25 with balanced (60s). Fast is 30s; balanced and explicit economy are 60s. The 60-second ceiling is absolute for recommendations; slower routes are reference-only. Never approves, prepares, signs, or submits.
    assetfare_v2_quote_selected_candidateReuse the chosen exact request-time quote while valid; after expiry refresh only that candidate at the same amount and never reselect. Example: pass candidate_id and the selection receipt hash. An AssetFare result requires a caller-local proof check and fresh wallet simulation before verified_for_signing; remote verification is not signing authority. An external result is only its provider handoff and has no AssetFare transaction-verification claim. Never prepares, signs, submits, or grants transaction authority.
    assetfare_v2_quoteGet one fresh AssetFare quote with amount-specific economic_guidance, direct_route_summary, continuation_v3, and unsigned_prepare_requirements. Example: quote Solana USDC to Base USDC. price_recommended_for_amount is advisory; compare alternatives when price matters, but no economic acknowledgement field is required. The quote remains an unranked_candidate until separate explicit approval selects one mode. The adapter validates hashes, path, bounds, and TTL and never creates approval, prepares, signs, or submits.
    assetfare_v2_prepareReturn one deeply verified first unsigned bundle and caller-wallet handoff. Example: pass caller_approved=true, a one_shot approval_v3, and the quote-bound verification_context; multi-step routes reject one_shot. Economic guidance is advisory and adds no request field. Context is validated before the upstream request and never forwarded. AssetFare never signs or submits.
    assetfare_v2_session_createCreate one receipt-driven workflow. Example: pass caller_approved=true, a session approval_v3, its idempotency_key, a caller-local session token, and the quote-bound verification_context. Economic guidance is advisory and adds no request field. The adapter validates approval and context before the upstream request. Every returned action is deeply verified and receives a caller-wallet handoff. AssetFare never signs or submits.
    assetfare_v2_session_getRead an existing v2 workflow without advancing it. Example: pass session_id, session_token, and the original verification_context after restart. The adapter deeply verifies any current_action and emits a self-verifying wallet handoff, or fails closed. Read-only; never signs or submits.
    assetfare_v2_session_observe_sourceRecord source hashes the caller already signed and submitted, then advance the workflow. Example: pass one finalized source hash, a new idempotency key, and the original verification_context. Any next current_action is deeply verified and receives a wallet handoff. AssetFare never signs or submits.
    assetfare_v2_session_observe_outputRecord an already-produced bridge or destination output, then advance the workflow. Example: pass the output hash, a new idempotency key, and the original verification_context. Any next current_action is deeply verified and receives a wallet handoff. AssetFare never signs or submits.
    assetfare_v2_session_refresh_actionRefresh an expired action only while it remains unsubmitted. Example: pass the existing session, a new idempotency key, and the original verification_context. The refreshed action is deeply verified and receives a wallet handoff. Never refresh a submitted step; AssetFare never signs or submits.