The four files that make a surface legible & actionable

Drop-in Agent Kit: spoken in Google's own standard.

These are prototype files, in the exact shape A2A and the llms.txt convention expect. They make a Google sustainability surface answerable to any assistant, and hand that assistant a funded, proof-verified destination for real ecological work. Endpoints shown are illustrative; the EWP contract and x402 lanes they point at are live and verifiable.

Concept files · illustrative endpoints · not Google-published

1 · llms.txt: the map an assistant reads first

A one-file index for a sustainability surface: what it commits to, and where the real work destination is.

sustainability.google/llms.txtconcept · text/markdown

# Google Sustainability — agent index (concept)

> Google's environmental commitments, exposed for assistants,
> with a funded, proof-verified destination for ecological work.

## Commitments (queryable)
- 24/7 carbon-free energy on every grid by 2030
- Net-zero across operations and value chain
- 2026 Environmental Report

## Act on it — via EcoWealth Work Protocol (partner)
- Discover work: https://vealth.net/labor/stats
- Machine payment (x402): https://vealth.net/.well-known/x402
- Contract (Base, verified): 0x76c17C51336BE7B39F5164802e08b9811477A14B
- Ladders: Build (LBC) · Grow & Cook (Michelin) · Restore (UN SDGs)

2 · agent-card.json: A2A discovery (Google's own standard)

The file that's a 404 today. This is what an A2A-speaking agent expects to find.

/.well-known/agent-card.jsonconcept · a2a/1.0

{
  "protocolVersion": "a2a/1.0",
  "name": "Google Sustainability Agent",
  "description": "Query Google's carbon commitments; route ecological work to a funded, proof-verified destination.",
  "skills": [
    { "id": "query_carbon_commitment", "tags": ["sustainability"] },
    { "id": "discover_ecological_work", "tags": ["labor","restore"] },
    { "id": "route_to_ewp", "tags": ["settle","onchain"] }
  ],
  "partners": [{ "name": "EcoWealth Work Protocol", "url": "https://vealth.net" }],
  "payment": { "scheme": "x402", "endpoint": "https://vealth.net/.well-known/x402" }
}

3 · MCP tool schemas: what an agent can call

The verbs. Named plainly; each returns a structured object, and the work-settling ones end in an on-chain receipt.

tools.jsonconcept · MCP

[
  { "name": "query_carbon_commitment",
    "description": "Return a Google commitment as structured data (goal, target year, evidence URL).",
    "input": { "topic": "string" } },

  { "name": "discover_ecological_work",
    "description": "Find a funded work-packet by ladder + geography.",
    "input": { "ladder": "restore|build|grow_cook", "near": "string" } },

  { "name": "fund_packet",
    "description": "Pay a work-packet keyless over x402 ($0.10).",
    "input": { "packetId": "string" }, "returns": "payment_receipt" },

  { "name": "submit_proof",
    "description": "Attach photo + GPS + method to a claimed packet.",
    "input": { "packetId": "string", "proof": "object" } },

  { "name": "settle_and_receipt",
    "description": "Verify proof, settle on Base, return the permanent tCO2e receipt.",
    "returns": "onchain_receipt" }
]

4 · Concierge persona: how the agent should speak

"Aria": Google Sustainability concierge (concept)

Voice: plain, precise, credit-first. Grounds every claim in a real commitment URL. Never overstates; when something is a pledge not a proof, says so.

Job: turn "I want to help the climate" into a funded, proof-verified action with a receipt, not a link to a report.

Answer commitment questions from query_carbon_commitment, always with the source URL.

When a user wants to act, route to a real EWP ladder packet near them; fund keyless over x402.

End every completed action with the on-chain receipt: the settled object, not a summary.

Distinguish "live today" (contract, workId 14) from "pilot" (external settlement); the truthbox at the top of every page is the standing rule.

Four files. Google's own standard. A live destination on the other end.

None of this touches Google's systems. It makes a sustainability surface legible over A2A, and points agents at funded, proof-verified ecological work that settles on Base. Start with one $0.10 call: the whole thing is provable for a dime.

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