A
licenseA
qualityB
maintenanceCryptographic accountability for AI agents. Ed25519-signed receipts for every MCP tool call. Constraints, chains, AI judgment, invoicing, and local dashboard included.
24
4 npm
1
MIT
Yield Agentic Hub
by Fabio662
The Yield Agentic Hub (YieldAgentX402) is a custody-free, policy-gated, receipt-backed execution layer for AI agents, enabling secure and verifiable financial and business operations across 18 blockchain networks.
Discovery & Platform
yax_get_capabilities: Explore all available tools, chains, rate limits, and configs — no API key required
Execution & Payments
yax_run_secure_workflow: Execute agent actions (API calls, emails, on-chain transactions) with policy enforcement and TEE attestationyax_process_x402_payment: Send USDC, STX, NEAR, or ETH payments to EVM, NEAR, or Stacks addresses with spend cap validation
Policy & Compliance
yax_check_policy: Dry-run an action to preview approval status and spend cap impact before executingyax_submit_approval: Approve or deny pending policy approval tokensyax_control_workflow: Stop or resume orchestration workflow runsyax_audit_compliance: Audit agent activity against policy rules and generate Filecoin-anchored compliance reports
Receipts & Verification
yax_get_receipt: Fetch full signed receipts with policy results, TEE attestation, and Filecoin/BTFS proof CIDsyax_verify_receipt: Cryptographically verify a receipt's signature and confirm its Filecoin anchoryax_list_runs: View recent agent runs filtered by outcome (approved/denied/escalated)
Wallet & Finance
yax_get_wallet_status: View USDC balance, spend cap, and remaining capyax_forecast_cash_flow: Generate week-by-week cash flow forecasts across base, optimistic, and pessimistic scenariosyax_collect_ar_invoices: Analyze overdue invoices by aging bucket and send escalating follow-up emails
CRM & Sales Automation
yax_score_leads: Score inbound leads (0–100) by conversion likelihood and sync to CRMyax_enrich_lead_data: Parse raw emails, forms, or webhooks into structured CRM-ready contact recordsyax_build_email_sequence: Generate personalized multi-step cold email campaigns for prospect listsyax_monitor_churn_risk: Identify at-risk customers by usage/payment patterns and draft re-engagement emails
Security & Attestation
yax_get_attestation: Verify the Intel TDX TEE enclave is operational with a verifiable mrEnclave hash before high-value actions
Under the hood, every execution is backed by HMAC-SHA256 signed receipts and dual Filecoin/BTFS anchoring for tamper-proof permanent storage. SDKs are available for TypeScript, CrewAI, and LangChain.
Provides tools for interacting with Algorand, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Algorand blockchain.
Provides tools for interacting with Bitcoin (native), including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Bitcoin blockchain.
Provides tools for interacting with Ethereum, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Ethereum blockchain.
Provides tools for interacting with NEAR, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the NEAR blockchain.
Provides tools for interacting with Solana, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Solana blockchain.
Provides tools for interacting with Stellar, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Stellar blockchain.
Provides tools for interacting with Sui, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the Sui blockchain.
Provides tools for interacting with TON, including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the TON blockchain.
Provides tools for interacting with XRP Ledger (XRPL), including discovery, secure workflow execution, x402 payment settlement, policy dry-run, receipt verification, and attestation, enabling AI agents to perform financial operations on the XRP Ledger.
YieldAgentX402 SDKs
Public client libraries and integrations for YieldAgentX402 — the custody-free, policy-gated, receipt-backed execution layer for AI agents.
Platform · MCP Docs · Try without signup · Get API key
This repo hosts the open-source distribution packages. The platform itself (gateway, ShadeGuard policy engine, TEE attestation, orchestrator, Filecoin/BTFS anchoring) lives in a separate private repository — we ship the bits agents need to use the platform here.
Packages in this repo
Package | Registry | What it does |
npm: | Typed TypeScript SDK. Wraps all 18 MCP tools with first-class types, idempotency, webhook verify, Shade Agent helpers. Zero deps. Works in Node, browsers, Workers, Deno, Bun. | |
npm: | Stdio MCP wrapper. Drop into Claude Desktop / Code / Cursor / Windsurf for all 18 YieldAgentX402 tools across 18 chains. Glama: listing. | |
Zero-dependency WebCrypto verifier for receipts + webhook signatures. Works in browser, Node 18+, Cloudflare Workers, Deno. | ||
CrewAI tool wrappers — policy dry-run, x402 payment, secure workflow, receipt verify, Shade Agent MPC wallet status. | ||
PyPI: | LangChain tool wrappers — discovery, policy preview, receipt verify, action planner (MCP gateway). |
Related MCP server: dingdawg-governance
Try without signup
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":{}}}'No API key required. Returns all 18 tools, 18 chains, rate limits, fees, supported runtime configs.
Want an instant test key?
curl -X POST https://api.yieldagentx402.app/api/apply \
-H "Content-Type: application/json" \
-d '{"agent_name":"my-agent"}'Returns a yax_test_* key (5 USD cap, 7-day expiry) for safe read-only tools.
What is YieldAgentX402?
A trust layer for agents that move money.
18 MCP tools — discovery, secure workflow execution, x402 payment settlement, policy dry-run, approvals, receipt verification, attestation, finance/CRM skill tools
18 chains — Base, Ethereum, Bitcoin (native), Starknet, NEAR, Solana, Stacks, BNB, Rootstock, Filecoin EVM + native, Aptos, Sui, TON, Tron, XRPL, Stellar, Algorand
Custody-free wallet — one NEAR MPC key authority derives EVM + BTC addresses on demand. No private keys held by the gateway or worker. Starknet uses Stark curve preset.
Intel TDX TEE attestation — mrEnclave verifiable at
/api/tee/reportHMAC-SHA256 receipts — every call returns a signed receipt
Filecoin + BTFS dual anchoring — permanent tamper-proof proof storage
x402 protocol settlement — 0.25% protocol fee, machine-verifiable in
/.well-known/x402asextra.protocolFeeBps: 25
Custody-free wallet — one MPC key, three chains
Chain | Address | Curve |
EVM (Base/Eth) |
| secp256k1 (MPC) |
Bitcoin (P2WPKH) |
| secp256k1 (MPC) |
Starknet |
| Stark (preset) |
Live manifest: https://shade-agent-worker.cryptoblac.workers.dev/api/wallet
Live infra
Surface | URL |
MCP endpoint | |
Public discovery |
|
Instant test key |
|
Ready-to-paste configs |
|
x402 manifest | |
MCP manifest | |
Status | |
TEE report | |
Shade Agent wallet | https://shade-agent-worker.cryptoblac.workers.dev/api/wallet |
Receipt verifier (UI) | |
Postman collection | https://yieldagentx402.app/postman/yieldagentx402.postman_collection.json |
Contributing
Issues and PRs on the public SDK packages are welcome here. Platform-level changes (gateway, policy engine, TEE worker) happen in a private repo — open an issue if you have a feature request and we'll triage.
License
MIT — see LICENSE.
Available Tools
18 toolsyax_audit_complianceARead-onlyIdempotent
Audits recent agent activity against your policy rules and flags violations. Returns compliant vs flagged run counts, violation details, and a Filecoin-anchored compliance report CID.
Inputs: period, policy_id, format. Returns: ok, run_id, compliant_runs, flagged_runs, +2 more
yax_build_email_sequenceA
Builds a personalized cold email sequence for a list of prospects. Researches each prospect and writes tailored copy. Returns subject lines, body, and send schedule per prospect.
Inputs: prospects (required), offer (required), sequence_length, tone. Returns: ok, run_id, sequences
yax_check_policyARead-onlyIdempotent
Checks if an action would be approved by your policy without running it. Returns approved/denied, remaining spend cap, and whether human approval is required.
Inputs: action_type (required), parameters. Returns: decision, policy_version, shade_guard, cap_remaining_usd, +1 more
yax_collect_ar_invoicesA
Analyzes open invoices by age (30/60/90+ days) and sends escalating follow-up emails to overdue clients. Returns invoice count, total overdue amount, and emails sent per bucket.
Inputs: aging_buckets, send_emails, escalate_at. Returns: ok, run_id, invoices_scanned, overdue_count, +3 more
yax_control_workflowBDestructive
Stop (cancel) or resume (approve human gate) an orchestration workflow run for this agent.
Inputs: workflow_id (required), action (required).
yax_enrich_lead_dataA
Parses a raw lead email, form submission, or webhook payload into a structured contact record, enriches it, and logs it to your CRM. Returns name, email, company, phone, and ICP score.
Inputs: source (required), raw_content, crm_push. Returns: ok, run_id, lead, crm_synced
yax_forecast_cash_flowARead-onlyIdempotent
Generates a week-by-week cash flow forecast across base, optimistic, and pessimistic scenarios. Returns inflow/outflow projections and a Filecoin-anchored report CID for board or lender use.
Inputs: horizon_weeks, scenarios, include_ar. Returns: ok, run_id, forecast, report_cid
yax_get_attestationARead-onlyIdempotent
Checks whether the TEE enclave is operational. Returns enclave status, the verifiable mrEnclave hash, and timestamp of last attestation. Use before high-value actions.
Inputs: no named parameters. Returns: ok, status, enclave_hash, last_attestation, +1 more
yax_get_capabilitiesARead-onlyIdempotent
Returns every tool available on this server, what each one does, and when to use it. Call this first when connecting to understand the platform.
Inputs: no named parameters. Returns: differentiators, security, tool_categories, getting_started
yax_get_receiptARead-onlyIdempotent
Fetches the full signed receipt for any past run. Returns policy result, TEE attestation, input/output hashes, and Filecoin + BTFS proof CIDs.
Inputs: run_id (required). Returns: run_id, policy, tee_attestation, input_hash, +4 more
yax_get_wallet_statusARead-onlyIdempotent
Returns the agent's wallet balance, spend cap, remaining cap for this period, and wallet address. Use before a payment to confirm funds are available.
Inputs: no named parameters. Returns: balance_usdc, spend_cap_usd, cap_remaining_usd, custody
yax_list_runsARead-onlyIdempotent
Lists recent agent runs with status and policy result. Filter by outcome (approved/denied/escalated) to audit activity or find run IDs for receipt lookup.
Inputs: limit, outcome, since. Returns: runs, total
yax_monitor_churn_riskA
Flags customers at risk of churning based on usage and payment patterns, and drafts a re-engagement email per account. Returns a prioritized risk list with churn score and outreach copy.
Inputs: customer_ids, risk_threshold, draft_emails. Returns: ok, run_id, at_risk, total_flagged
yax_process_x402_paymentADestructive
Sends an x402 payment to any EVM, NEAR, or Stacks address. Validates against your spend cap before signing. Returns transaction hash and signed receipt.
Inputs: recipient (required), amount (required), token, memo. Returns: run_id, tx_hash, status, proof, +2 more
yax_run_secure_workflowADestructive
Runs any agent action — email, API call, on-chain tx, or workflow — with policy enforcement and TEE attestation. Returns a run ID, policy decision, and signed Filecoin-anchored receipt.
Inputs: intent (required), action_type (required), parameters, spend_cap_override, +1 more. Returns: run_id, status, policy, tee_attestation, +3 more
yax_score_leadsA
Scores inbound leads by conversion likelihood and syncs enriched records to your CRM. Returns each lead with a score (0–100), tier (hot/warm/cold), and enrichment data.
Inputs: leads (required), crm_push, score_model. Returns: ok, run_id, leads, crm_synced
yax_submit_approvalB
Approve or deny a pending policy approval token for the authenticated agent.
Inputs: approval_id (required), decision (required).
yax_verify_receiptARead-onlyIdempotent
Confirms a receipt's cryptographic signature is valid and its Filecoin anchor exists. Returns verified: true/false, signature status, and anchor CIDs.
Inputs: run_id (required), filecoin_cid. Returns: verified, signature_ok, anchor_exists, filecoin_cid, +1 more
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
TDQS
A3.9/5.0
Scored across 18 tools
Disambiguation4/5
Most tools have distinct purposes (e.g., audit vs. email sequence vs. payment), but slight overlap exists between yax_enrich_lead_data and yax_score_leads (both deal with leads) and between yax_run_secure_workflow and yax_control_workflow (both manage workflows). Descriptions clarify differences.
Naming Consistency5/5
All tools follow the consistent pattern 'yax_verb_noun' in snake_case, e.g., yax_check_policy, yax_forecast_cash_flow. No mixing of styles or irregular names.
Tool Count5/5
18 tools is appropriate for a multifunctional agentic hub covering audit, email, invoices, leads, workflow, payments, and attestation. Each tool serves a clear niche without redundancy.
Completeness4/5
Covers major business operations (CRM, invoicing, payments, compliance, workflow), but lacks tools for direct policy editing or advanced CRM management. Minor gaps exist for a fully autonomous agent.
Maintenance
ActivityInactive
ResponsivenessNo recent community issues
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Pre-execution safety layer for autonomous agent wallets via MCP and x402.
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- AlicenseNot gradedqualityAmaintenanceDeterministic, auditable payment policy enforcement for AI agents. It provides pre-action authorization with scopes, budgets, allowlists, and signed mandates via an MCP server.MIT
