OneSource
OneSource unifies blockchain data behind a single agent-native API. Ask in natural language or REST, pay with x402, MPP, or use an API key.
https://onesource.ioOpens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
Connect straight to this server’s public endpoint.
https://mcp.onesource.io/We add this server to your workspace, then open Studio — saved access, one connection to many servers, with a history of what ran.
Last probed Sep 18, 2026 · mcp.onesource.io
63tools discovered
Showing 25 of 63
Showing 25 of 63 tools from the public preview. Connect the server to inspect the full live tool list.
ERC-20 Allowance
1s_allowance_liveCheck ERC20 token allowance (approved spending amount) via the allowance(owner,spender) RPC call. Use this before executing transferFrom or to verify approvals. Returns the allowance amount in raw token units. Optional fields the response could not confirm are listed in warnings; a field that is missing or false for that reason is unknown for this response, not a confirmed answer.
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A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsOneSource unifies blockchain data behind a single agent-native API. Ask in natural language or REST, pay with x402, MPP, or use an API key.
Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.
Request removal if you do not want OneSource listed here, or claim the listing if you want to manage it on MCPBundles.
This server appears in the MCPBundles directory. Verify you operate it to take over the listing — name, description, logo, contact email, and skill content. We email a 6-digit code to a maintainer address your server publishes in /.well-known/security.txt or /.well-known/mcpbundles.json. Free, takes about a minute.
MCPBundles probed 63 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.
No provider sign-in was required during MCPBundles' probe. Your client may still need MCPBundles credentials depending on how you connect.
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