More Trees for AI agents
More Trees plants trees on behalf of individuals or businesses to offset carbon footprints and support reforestation projects around the world. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.
What agents do in More Trees.
Check total carbon offset
Look up the total carbon offset recorded for an account, a read-only summary.
List active reforestation projects
List the projects currently available for tree planting contributions before choosing where a donation should go.
Register a new supporter
Create a new user record when someone signs up to offset their footprint.
4 More Trees actions, graded by risk.
Every More Trees action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.
read
3Look things up. Allowed by default.
- more_trees.list_projectsList Projects
- more_trees.get_total_carbon_offsetGet Total Carbon Offset
- more_trees.get_marketing_preferencesGet Marketing Preferences
write
1Create and change things. Allow, or ask the user first.
- more_trees.create_userCreate User
destructive
0Delete, cancel or archive. Ask first, or deny outright.
- No destructive actions.
More Trees in three steps.
- 01Your users connect More TreesThey add their More Trees api key on Arc0 Connect, under your brand. It goes straight into the vault.
- 02You set the rulesReads run, and writes like “create User” can wait for the user to approve.
- 03Any agent can actYour agent calls More Trees through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
await arc0.policies.set('more_trees', { read: 'allow', write: 'ask', // create_user destructive: 'deny', }) # Claude Code: the same connection, one URL $ claude mcp add --transport http arc0 \ https://mcp.arc0.ai/u/u_8f2
How More Trees connects.
Users add their More Trees api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
The same More Trees connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →
- AUTH
- API key
- CREDENTIALS
- Per-tenant encrypted vault
- MODEL SEES
- Results only, never credentials
- AUDIT LOG
- Every call, on every plan
Use More Trees from any agent.
ClaudeChatGPTCursor
Codex
VS CodeOpenAI Agents SDKClaude Agent SDK
Vercel AI SDK
Mastra
LangGraph
More Trees and Arc0, answered.
Can I use More Trees with Claude, ChatGPT or Cursor?
Yes. Connect More Trees to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the More Trees actions you allow.
How do users connect More Trees?
Users add their More Trees api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
Which More Trees actions can my agent take?
4 in total: 3 read, 1 write and 0 destructive, such as “create User”. Your policies decide which of them each agent may call.
Can I make my agent read-only in More Trees?
Yes. Allow read actions and deny writes in the More Trees policy. Your agent can still look things up, and any write it attempts is blocked and logged.
Can my own backend call More Trees too?
Yes. The same More Trees connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.
Plug More Trees into your agent.
Your users connect More Trees once, under your brand. Your agent gets 4 actions behind your policies, with every call on the record.
Free to build · MCP + REST · Audit log on every plan