Muse

Ask Muse to set up a Nansen custom connector, then sign in with your Nansen account. No API key needed.

Connect Nansen to Muse by pasting a setup prompt into a conversation. Muse configures a custom connector and guides you through Nansen sign-in. This uses Muse's custom connector support.

What you need

A Muse account with custom connector access and a Nansen account. Sign in with the Nansen account whose API credits you want to use.

Tool calls spend your Nansen API credits, not your Muse subscription, and are subject to rate limits. One request can trigger several calls. Nansen is read-only and cannot trade, sign transactions, or move assets.

Connect Nansen

Muse handles the OAuth configuration. You do not need to create an OAuth client or enter these settings manually. No manual Resource setting is needed for this Muse setup. Use the Muse settings below when connecting through Muse.

1. Open Muse and start a conversation.

2. Copy the entire prompt below and send it to Muse.

Set up a custom connector named "Nansen" using these settings:

MCP server URL: https://mcp.nansen.ai/ra/connector-curated/mcp
Transport: Streamable HTTP
Authentication: OAuth authorization code with PKCE S256
Client secret: none, leave empty
Token endpoint authentication method: none
Authorization endpoint: https://idp.nansen.ai/authorize
Token endpoint: https://idp.nansen.ai/token
Scope: nansen:read
Redirect URI: https://agent.meta.ai/api/hatch/oauth/callback

Use Muse's registered OAuth client for Nansen, with client_id=muse.

Start OAuth and give me the sign-in link so I can sign in to Nansen
and approve access myself. Store credentials in your Secure Credentials
Store. Do not ask me to paste a password, API key, authorization code,
or token into this conversation.

After sign-in, discover and list the available tools. Do not run any
data queries yet. A tool list alone does not prove that queries work.

1. Open the sign-in link Muse provides. Sign in on Nansen's site and approve read-only access. Return to Muse to finish connecting.

2. Confirm Muse lists the 12 curated tools, including general_search and token_info.

Verify your connection

Send this in the same conversation:

Use the production Nansen connector to search for the token ETH with general_search. Run only that search, show the returned data, and report any tool error. Do not look up an address or domain, or run follow-up tools.

A token search with general_search costs 0 credits. Address labeling and .eth or .sol name resolution cost 500 credits, so keep this check to the token name ETH. See credits per call.

Check that Muse actually calls Nansen and returns a tool result without an authentication or tool error. A general answer about ETH or a list of tools does not verify the connection. Search results can change; do not expect a fixed result count.

Try a research prompt

Once the verification succeeds, you can ask:

• "Use Nansen to find Wintermute."

• "Use Nansen to get token information for USDC on Ethereum."

Muse uses the same 12 curated tools as ChatGPT, Claude, and Grok. For tools outside this set, use Manually connecting to Nansen MCP with another MCP client.

Troubleshooting

Problem	What to do
Muse asks for an API key or client secret	Ask it to use the OAuth settings in the setup prompt. This connector does not need either.
Invalid client or redirect URI	Ask Muse to use its registered OAuth client for Nansen, with client_id=muse, and the redirect URI in the prompt. If Muse uses a different callback, contact Nansen support with the callback URL only, without query parameters or credentials.
Sign-in is requested again, or access is denied	Ask Muse to reconnect Nansen and sign in with the intended account.
Muse lists tools but answers without calling Nansen	Ask it to use the production Nansen connector and repeat the verification step.
Insufficient credits	Check the signed-in account's balance at Nansen API.
Rate limit reached	Wait and follow the error's retry guidance.
Tool error with a request ID	Save the request ID, error text, time, and prompt for Nansen support. Do not share passwords, tokens, authorization codes, or screenshots containing credentials.

To disconnect, open Muse's Settings → Connectors and disconnect Nansen.