verdigraph
Verifiable cognition: compile any agent file (Claude project export, OpenAI Assistant config, genome, prompt list) into a deterministic content-addressed brain_id with a machine-checkable 9-invariant report. Verification free forever.
Try it (copy-paste):
```bash
curl -s https://mcp.viridisconservation.com/verdigraph/mcp -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"build_brain","arguments":{"content":"<your agent file as a string>","format":"auto"}}}'
```
Returns a deterministic brain_id, content_hash, and 9-invariant report. Same bytes, same brain, every time.
Pricing: $0.25/build after 10 free calls/day, no signup. Reads and verification are free.
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.
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