verdigraph

agent-verified-relay

Viridis Verified wraps any MCP server with tamper-evident delivery receipts. Relay a tools/call through the gateway and get a hash-chained receipt (request hash, response hash, outcome, latency) — idempotent, dispute-ready evidence, metered per call. Prove what an agent's tool call actually returned; audit a disputed agent-to-agent transaction. Composes with Viridis surety bonds, arbitration, and reputation. 10 free calls/day, then $0.02/call.

regulatory-radar

CSRD/TNFD climate-disclosure compliance-as-a-service — which sustainability regulation deadlines apply to a company, tracked across jurisdictions. Part of the Viridis Agent Fleet. Durable state, free to call. Genesis receipts: github.com/jdhart81/viridis-agent-fleet/blob/main/docs/GENESIS_RECEIPTS.md

taxcredit-engine

Auditable deterministic US clean-energy tax-credit scenarios for 45Q, 45V, 45Y, 48E, and 45X. Versioned IRS rule packs, exact arithmetic, eligibility flags, audit hashes, and notary-ready proof. **Try it (copy-paste):** `calculate_tax_credit` with `{"credit":"45V","facts":{"tax_year":2026,"kg_hydrogen":"1000","lifecycle_kg_co2e_per_kg_h2":"0.44","greet_version":"45VH2-GREET-2025","pwa_met":true,"produced_in_us":true,...}}` → returns `credit_amount_usd: "3280.00"` with a reproducible `audit_sha256`. **Pricing:** 10 free calls/day, then $2.00/calculation. Pay as a human via Stripe (`create_payment` → `redeem_payment`) or as an agent via x402 escrow: fund an escrow payable to `viridis:taxcredit-engine` at mcp.viridisconservation.com/escrow/mcp, then retry with `payment_ref=<escrow_id>`. The 402 envelope carries full instructions.

agent-covenant

Deny-by-default, revocable authority leases that scope exactly what an autonomous agent is allowed to do — scoped permissions, spend budgets, expiry, and a verifiable audit chain of every authorized act. Part of the Viridis Agent Fleet. Durable state, free to call. Genesis receipts: github.com/jdhart81/viridis-agent-fleet/blob/main/docs/GENESIS_RECEIPTS.md

Viridis Disclosure Compiler

Start here: Regulatory Radar — one bounded x402 compliance scan on Base. List price: $0.25. Inspect the live unpaid quote before signing; the quote is authoritative for this buyer. Other live carbon + compliance routes: • quantity-takeoff — $0.50 • ghg-ledger — $1.00 • disclosure-compiler — $2.00 • taxcredit-engine — $2.00 • regulatory-radar — $0.25 • regulatory-radar — $0.25 • hive — $5.00 • security-preflight — $1.00 No signup or API key. A caller receives HTTP 402, settles Base USDC, and gets the deterministic result. Successful paid responses include a buyer-verifiable viridis-paid-delivery-v1 receipt binding the result digest to the settlement. Buyer acceptance and usefulness remain unobserved. First paid call from a new wallet is $0.01. Live external proof: 4 settlement(s) from 4 distinct payer(s). Returning buyer? Put your public signing address in X402-Payer-Address on the unpaid preflight to receive the exact returning-wallet quote the first time. The hint never authorizes payment—never send a private key. Free dry-run: https://mcp.viridisconservation.com/quickstart Agent suite: https://mcp.viridisconservation.com/agents

agent-offset-clearinghouse

Verified-credit carbon offset clearinghouse — list, purchase, and retire conservation credits with proof of retirement; only credits with verification references are accepted. The conservation flywheel of the agent economy. Part of the Viridis Agent Fleet. Durable state, free to call. Genesis receipts: github.com/jdhart81/viridis-agent-fleet/blob/main/docs/GENESIS_RECEIPTS.md

Press Release

press-release MCP — wraps StupidAPIs (requires X-API-Key)

MCP Server for LimeSurvey

Enables interaction with LimeSurvey API to create and manage surveys, questions, question groups, activate surveys, and export responses through standardized MCP endpoints.

io.github.zenml-io/mcp-zenml

MCP server for ZenML - browse stacks, pipelines, runs, artifacts & trigger pipeline runs via API

Linear

Linear MCP — wraps the Linear GraphQL API (OAuth)

HAPI MCP Server

HAPI MCP server: Dynamically exposes OpenAPI REST APIs as MCP tools for AI assistants

Google Docs MCP Server

Enables Claude to read, create, and update Google Docs through OAuth authentication. Deployed as a remote Next.js server on Vercel with support for multiple users and secure API key management.