Yieldagentx402

io.github.Fabio662Published by GitHub account Fabio662v1.0.4Updated Oct 24, 2026

Policy-gated x402 MCP for agent workflows with TEE receipts, 18 tools, and no custody.

VerifiedSTDIODesktop onlyFinance Security & Monitoring Business & Commerce

Server details

Identifier: io.github.Fabio662/yieldagentx402
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Sep 16, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified the GitHub account Fabio662 for this listing. That does not show the account is the product's maker.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Local stdio wrapper that connects an assistant to the hosted YieldAgentX402 endpoint for policy-checked x402 payments, attested runs and signed receipts.

What you can do: Discover capabilities and check wallet status without custody
Run secure workflows and process x402 payments across many chains
Check policy, submit approvals, control workflows, audit compliance and fetch attestations
Retrieve, verify and list receipts and past runs
Run business workflows such as lead scoring, lead enrichment, email sequences, churn monitoring, AR invoice collection and cash-flow forecasting
When to use it: For agents that need to move or route funds through x402 payments with policy gating and verifiable receipts, or that run the vendor's lead, churn and cash-flow workflows. Useful when an audit trail and TEE attestation matter more than a plain payment call.
Requirements: Runs locally via npx (Node.js) and forwards calls to the hosted endpoint at api.yieldagentx402.app; an API key in YAX_API_KEY is needed for non-public tools, YAX_AGENT_ID is optional, and YAX_MCP_ENDPOINT or YAX_API_BASE can override the endpoint. Network access to the vendor's service is required.

Before you install

The API key in YAX_API_KEY is a live credential for a payment-capable service; tools can process x402 payments and run workflows that spend funds, so policy and approval steps should be reviewed before use. Calls and their data go to the third-party hosted endpoint, and receipts are anchored to Filecoin and BTFS when uploads succeed.

Installation

In SourceWeft

Open Yieldagentx402 in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

agentx402-mcp-server

Policy-gated, receipt-backed x402 execution for AI agents — ShadeGuard before funds move, TEE-attested runs, verifiable proof. Thin stdio wrapper for the live YieldAgentX402 MCP endpoint.

Proof: 18 tools · 18 chains · no custody · signed receipts on every call.

Docs · Try without signup · Get API Key · What is x402?

[yieldagentx402-sdks MCP server]

Try it now (no signup)

The yax_get_capabilities tool is public — you can discover everything before you ever sign up.

bash

curl -X POST https://api.yieldagentx402.app/mcp \  -H "Content-Type: application/json" \  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",       "params":{"name":"yax_get_capabilities","arguments":{}}}'

curl -X POST https://api.yieldagentx402.app/mcp \  -H "Content-Type: application/json" \  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",       "params":{"name":"yax_get_capabilities","arguments":{}}}'

Returns: differentiators (pitch), proof_points (18 tools · 18 chains · no custody · signed receipts), security posture, and live infra status.

Install (1 minute)

Works with Claude Desktop, Claude Code, Cursor, Windsurf, Zed, and any MCP 2025-03-26 stdio client.

json

{  "mcpServers": {    "yieldagentx402": {      "command": "npx",      "args": ["-y", "agentx402-mcp-server"],      "env": {        "YAX_API_KEY": "yax_live_...",        "YAX_AGENT_ID": "optional-agent-id"      }    }  }}

{  "mcpServers": {    "yieldagentx402": {      "command": "npx",      "args": ["-y", "agentx402-mcp-server"],      "env": {        "YAX_API_KEY": "yax_live_...",        "YAX_AGENT_ID": "optional-agent-id"      }    }  }}

Get an API key at https://yieldagentx402.app/apply (or call POST /api/agent-onboard for instant demo credentials).

Tools (18)

Category	Tools
Discovery (public, no auth)	`yax_get_capabilities`
Wallet & custody	`yax_get_wallet_status`
Execution	`yax_run_secure_workflow`, `yax_process_x402_payment`
Policy & governance	`yax_check_policy`, `yax_submit_approval`, `yax_control_workflow`, `yax_audit_compliance`, `yax_get_attestation`
Receipts & audit	`yax_get_receipt`, `yax_verify_receipt`, `yax_list_runs`
Workflows	`yax_score_leads`, `yax_enrich_lead_data`, `yax_build_email_sequence`, `yax_monitor_churn_risk`, `yax_collect_ar_invoices`, `yax_forecast_cash_flow`

Every tool call is:

ShadeGuard-policy-checked before execution
TEE-attested (Intel TDX, NEAR AI Cloud — mrEnclave verifiable at /api/tee/report)
Receipt-backed (HMAC-SHA256 over canonical JSON)
Filecoin + BTFS anchored when uploads succeed
Routed across 18 networks including Base, Ethereum, Bitcoin (native), Starknet, NEAR, Solana, Stacks, BNB, Rootstock, Filecoin, Aptos, Sui, TON, Tron, XRPL, Stellar, Algorand

Custody-free wallet — one MPC key, three chains

The Shade Agent (NEAR chain signatures) derives payment addresses on demand — no private keys held anywhere.

Live manifest: https://shade-agent-worker.cryptoblac.workers.dev/api/wallet

Configuration

Registry

Official MCP Registry: io.github.Fabio662/yieldagentx402 v1.0.4
Glama: Fabio662/yieldagentx402-sdks — release 0.1.2, tool quality scored
npm: [email protected] (this package)
Smithery: fabianjefferson2/agentx402-mcp-server
Remote endpoint: https://api.yieldagentx402.app/mcp (Streamable HTTP, MCP 2025-03-26)
x402scan: server/ddec8170…
Status: api.yieldagentx402.app/api/status

Development

The package is intentionally thin. Tool discovery and tool calls are provided by the public YieldAgentX402 MCP endpoint, so the local package stays truthful as the hosted server evolves.

License

MIT

Source: mcp-server/README.md at commit d1b05fc

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v1.0.4LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 days25 pts
Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.
Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
License10 pts

Chain	Address	Mode
EVM (Base/Eth)	`0x6905D04C3655625F6171f7b1e801a9325B1Fa1e8`	MPC-signed
Bitcoin (P2WPKH)	`bc1qcd8ljsj7x0rq3sw7drrt7ragqmmt3tfsfxs6gy`	MPC-signed
Starknet	`0x003a4e08…570906a21`	Stark curve, preset

Env var	Required	Default
`YAX_API_KEY`	Yes (for non-public tools)	—
`YAX_AGENT_ID`	No	—
`YAX_MCP_ENDPOINT`	No	`https://api.yieldagentx402.app/mcp`
`YAX_API_BASE`	No	(sets endpoint if `YAX_MCP_ENDPOINT` unset)