Chainweb API runs on your own machine — the client starts it, so there is no endpoint to ping. 34 installs a week from npm. Last commit 5 Sep 2026.
Chainweb HTTP API: local sim, pre-signed send, poll, table reads, SPV proofs, module deploys.
We read the source, 2 h ago · rules 3dff92dd89df
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
: path.join(workspaceRoot, candidate);
for (const [key, value] of Object.entries(process.env)) {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add chainweb -- npx -y @pact-community/mcp-chainweb
{
"mcpServers": {
"chainweb": {
"args": [
"-y",
"@pact-community/mcp-chainweb"
],
"command": "npx"
}
}
}
[mcp_servers.chainweb]
command = "npx"
args = ["-y", "@pact-community/mcp-chainweb"]
{
"mcpServers": {
"chainweb": {
"args": [
"-y",
"@pact-community/mcp-chainweb"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"chainweb": {
"args": [
"-y",
"@pact-community/mcp-chainweb"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
PACT_COMMUNITY_WORKSPACE_ROOT (Workspace root directory; all file access is confined inside it.), PACT_COMMUNITY_CHAINWEB_MODE (Network mode; must be set and match PACT_COMMUNITY_CHAINWEB_PROFILE (devnet, testnet06, or mainnet).), PACT_COMMUNITY_CHAINWEB_PROFILE (Network profile: devnet (default, read/write), testnet06, or mainnet (both read-only).), PACT_COMMUNITY_CHAINWEB_BASE_URL (Chainweb node base URL (default per profile).), PACT_COMMUNITY_CHAINWEB_NETWORK_ID (Network id, e.g. development, testnet06, mainnet01 (default per profile).).
The author declared them in the registry entry; get the values from the project itself.
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