Welcome to Chain 138 Snap

Add Chain 138 (DeFi Oracle Meta) to MetaMask and use market data, bridge, and swap.

Stable MetaMask: Production MetaMask only installs Snaps on MetaMask's verified allowlist. If install fails with "not on the allowlist", use MetaMask Flask for testing, or submit npm:chain138-snap via the Snaps Directory form. For balances without a Snap, use explorer wallet tools (Add Chain 138 + Add Token).

How to use: Install MetaMask Flask (recommended until allowlisted) → Connect → Install the Snap → Use Market, Bridge, and Swap below.

Chain 138 Send: If MetaMask’s in-wallet "Send" errors with "No XChain Swaps native asset found", use Send on Chain 138 instead.

Install

Snaps is pre-release software only available in MetaMask Flask, a canary distribution for developers with access to upcoming features.

Install MetaMask Flask

Connect

Get started by connecting to and installing the example snap.

Send Hello message

Display a custom message within a confirmation screen in MetaMask.

Market data

Set GATSBY_SNAP_API_BASE_URL to show market data.

Market summary

Set GATSBY_SNAP_API_BASE_URL to fetch market summary.

Bridge

Set GATSBY_SNAP_API_BASE_URL to show bridge routes.

Token list URL

Set GATSBY_SNAP_API_BASE_URL to get the token list URL.

Swap quote

Set GATSBY_SNAP_API_BASE_URL and enter token addresses + amount (raw).

When hosting the Snap yourself (e.g. for development), snap.manifest.json and package.json must be at the host’s root path, and the bundle must be served at the path given in source.location in the manifest. When installing from npm (production), the published package already satisfies this layout.