Gasless Anygas ROBYN Relay MCP Server

Robyn — AnyGas

A gasless intent layer for AI agents. Sign one intent, hold no native gas anywhere, and pay or move value across 22 EVM chains + Stellar mainnet. Robyn's relayer fronts the gas — on the source chain, the destination chain, and the bridge — and is reimbursed from the token being moved. The agent's signer needs zero native balance. It only signs.

🔗 Live now — anygas.xyz · Ask the concierge · Live mesh (JSON) · llms.txt

npx jsr add @robyn/agent-kit

import { RobynAgent } from '@robyn/agent-kit';

const agent = new RobynAgent({ signer, svc: 'https://api.anygas.xyz/svc' });

// Move value across chains — one signature, zero gas on either side.
const { id } = await agent.crossChain({
  fromChain: 8453,  fromToken: USDC_BASE,   // Base
  toChain:   42161, toToken:   USDC_ARB,    // Arbitrum
  amount:    25_000000n,
});

That's the whole thing. No faucet, no per-chain gas top-ups, no bridge picking, no native token held anywhere. The signer signs a single Permit2 intent; Robyn does the rest and takes its fee in the token being moved.

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What Robyn does

Two capabilities, one gasless model:

• Gasless pay — transfer or pay in any verified token on any supported chain. The relayer fronts gas and is repaid from the token (fee auto-converted to a verified asset when needed). See pay / payAny / buy.
• One-signature cross-chain — move value between any two supported chains (including to and from Stellar) with a single Permit2 signature and zero gas on either side. See route (quote) / crossChain (execute) / routeStatus (track).

Live on mainnet, both directions to Stellar.

The mesh — 22 EVM chains + Stellar

A single relayer mesh spans 22 EVM chains and Stellar mainnet. Any node can be a source or a destination — EVM↔EVM and EVM↔Stellar both run on mainnet today. Stellar is a first-class destination: set toChain: "stellar", toToken: "USDC".

Query the live registry and route graph at runtime — agent.chains() / agent.routeInfo(), or the robyn_mesh tool.

Proof — real mainnet transactions

Robyn is live. These are on-chain, verifiable moves — not testnet, not simulated:

Stellar mainnet contract: CDDJAVK2CLA2LIYJWXH4APVFEDQBH3HT72UFAVSLNBLDTEZELJ6PEKD2

Integrate three ways

Pick the surface that fits your stack. All three are MIT client packages published on JSR.

1. SDK — @robyn/agent-kit

The one-import way for an agent (or any automated system) to transact gaslessly.

npx jsr add @robyn/agent-kit

import { RobynAgent } from '@robyn/agent-kit';
const agent = new RobynAgent({ signer, svc });
await agent.payAny({ token: ANY, to: merchant, amount, verifiedAsset: USDG }); // gasless pay
await agent.crossChain({ fromChain: 8453, fromToken, amount, toChain: 42161, toToken }); // cross-chain

2. MCP server — @robyn/mcp

Give any MCP-capable agent (Claude Desktop, Cursor, agent frameworks) Robyn's tools directly.

npx jsr add @robyn/mcp

{
  "mcpServers": {
    "robyn": {
      "command": "npx",
      "args": ["-y", "robyn-mcp"],
      "env": {
        "ROBYN_SVC": "https://api.anygas.xyz/svc",
        "ROBYN_SIGNER_KEY": "0x…"   // optional — omit for a safe read-only server
      }
    }
  }
}

Tools: robyn_mesh, robyn_quote, robyn_route_status (no credentials) and robyn_cross_chain (needs a signer key).

3. Framework adapters — @robyn/adapters

The same four tools as a drop-in for the agent framework you already use.

npx jsr add @robyn/adapters

import { robynTools }          from '@robyn/adapters/ai-sdk';    // Vercel AI SDK
import { robynLangchainTools } from '@robyn/adapters/langchain'; // LangChain
import { robynActionProvider } from '@robyn/adapters/agentkit';  // Coinbase AgentKit
import { robynOpenAITools, robynAnthropicTools, robynDispatcher } from '@robyn/adapters/schemas'; // raw function-calling

Fees

• Gasless pay — the actual gas cost plus a small margin of ~5% of gas, charged in-token.
• Cross-chain — 0.25% of the moved amount, charged in-token.

Always paid from the token you're already moving — the agent never needs a native balance to cover fees. Every quote returns the fee before you execute (route / robyn_quote).

One-time setup

Cross-chain uses Permit2 SignatureTransfer. Once per (token, chain), the signer approves Permit2 to spend the token — a standard, single ERC-20 approval:

await token.approve('0x000000000022D473030F116dDEE9F6B43aC78BA3', ethers.MaxUint256);

After that, every move is a single gasless signature — no native token, ever.

Integrate, don't replicate

These packages are MIT — build on Robyn, ship it, and sell your product built with it, no restrictions. The license covers only these client libraries. Robyn's relayer, smart contracts, and network are proprietary and are not licensed here; don't use these packages (or the Robyn API) to run a competing gasless-relay service or to replicate Robyn. See NOTICE.

Build with Robyn: yes. Clone Robyn to cut it out: no.

Repo layout

packages/agent-kit/   @robyn/agent-kit — the SDK
packages/mcp/         @robyn/mcp — the MCP server
packages/adapters/    @robyn/adapters — framework adapters
docs/                 integration guide, fee & security overview

Docs

• Integration guide
• Fees & security

License

MIT for the client packages in this repo. See NOTICE for scope.