Opensea Tool SDK

npx @opensea/tool-sdk init --runtime vercel   # or: cloudflare, express

import { defineManifest } from "@opensea/tool-sdk"

export const manifest = defineManifest({
  name: "My Tool",
  description: "What this tool does",
  endpoint: "https://my-tool.example.com/api",
  creatorAddress: "0xYOUR_WALLET_ADDRESS",
  inputs: {
    type: "object",
    properties: {
      query: { type: "string", description: "Search query" },
    },
    required: ["query"],
  },
  outputs: {
    type: "object",
    properties: {
      result: { type: "string" },
    },
  },
  // Optional: add pricing for x402 paywall (see references/x402.md)
  // pricing: paywall.pricing,
  // Optional: add access requirements (see references/predicate-gating.md)
  // access: { logic: "OR", requirements: [...] },
})

import { createToolHandler } from "@opensea/tool-sdk"
import { z } from "zod/v4"
import { manifest } from "./manifest.js"

const InputSchema = z.object({ query: z.string() })
const OutputSchema = z.object({ result: z.string() })

export const toolHandler = createToolHandler({
  manifest,
  inputSchema: InputSchema,
  outputSchema: OutputSchema,
  // gates: [],  // Add gates here (see references/x402.md and references/predicate-gating.md)
  handler: async (input) => {
    return { result: `Processed: ${input.query}` }
  },
})

import { toVercelHandler } from "@opensea/tool-sdk"
import { toolHandler } from "../src/handler.js"
export default toVercelHandler(toolHandler)

import { toExpressHandler } from "@opensea/tool-sdk"
import { toolHandler } from "./handler.js"
app.post("/api", toExpressHandler(toolHandler))

import { toolHandler } from "./handler.js"
export default { fetch: toolHandler }

# Set up wallet
export PRIVATE_KEY=0x...
export RPC_URL=https://mainnet.base.org

# Register (open access, no predicate)
npx @opensea/tool-sdk register \
  --metadata https://my-tool.example.com/.well-known/ai-tool/my-tool.json \
  --network base

# Register with NFT gate (ERC-721 collection)
npx @opensea/tool-sdk register \
  --metadata https://my-tool.example.com/.well-known/ai-tool/my-tool.json \
  --network base \
  --nft-gate 0xCOLLECTION_ADDRESS

# Register with a custom access predicate
npx @opensea/tool-sdk register \
  --metadata https://my-tool.example.com/.well-known/ai-tool/my-tool.json \
  --network base \
  --access-predicate 0xPREDICATE_ADDRESS

# Dry run (no transaction)
npx @opensea/tool-sdk register --metadata ... --network base --dry-run

import { ToolRegistryClient, computeManifestHash } from "@opensea/tool-sdk"
import { createWalletFromEnv, walletAdapterToClient } from "@opensea/tool-sdk"
import { base } from "viem/chains"

const adapter = createWalletFromEnv()
const walletClient = await walletAdapterToClient(adapter, base)

const registry = new ToolRegistryClient({
  chain: base,
  rpcUrl: "https://mainnet.base.org",
  walletClient,
})

const { toolId, txHash } = await registry.registerTool({
  metadataURI: "https://my-tool.example.com/.well-known/ai-tool/my-tool.json",
  manifest,                                      // your ToolManifest object
  accessPredicate: "0x0000...0000",              // address(0) for open access
})

console.log(`Registered tool ${toolId} in tx ${txHash}`)

import { createWalletFromEnv } from "@opensea/tool-sdk"

const adapter = createWalletFromEnv()
const address = await adapter.getAddress()

import { createBankrAccount } from "@opensea/tool-sdk"

const account = await createBankrAccount("your-bankr-api-key")
// Use with authenticatedFetch or paidAuthenticatedFetch