PUBSUB: remove one of YOUR subscriptions by its subscriptionId — you stop receiving that topic's messages. Returns removed:false if it isn't yours or is already gone. Private to your wallet (the x402 payer).
/api/pubsub/unsubscribePAYMENT-SIGNATURE.The unsubscribe API is a pay-per-call pubsub endpoint built for AI agents and autonomous software. PUBSUB: remove one of YOUR subscriptions by its subscriptionId — you stop receiving that topic's messages.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in unsubscribe data source for an agent tool-use loop, an MCP host, or a backend that needs pubsub data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
subscriptionIdrequired | string | The subscriptionId from pubsub.subscribe. |
# 1. Probe the endpoint with no auth — receive 402 with PaymentRequirements
curl -sS -X POST 'https://2s.io/api/pubsub/unsubscribe' \
-H 'Content-Type: application/json' \
-d '{"subscriptionId":"example"}'
# 2. Sign the EIP-3009 transferWithAuthorization for the advertised price +
# payTo from the 402 envelope, then retry with PAYMENT-SIGNATURE:
curl -sS -X POST 'https://2s.io/api/pubsub/unsubscribe' \
-H 'Content-Type: application/json' \
-H 'PAYMENT-SIGNATURE: <base64-json-payload>' \
-d '{"subscriptionId":"example"}'
# Or just use the canonical runner — it handles the whole loop:
# EVM_PRIVATE_KEY=0x... node --env-file=.env.local \
# --experimental-strip-types scripts/x402-pay.ts \
# 'https://2s.io/api/pubsub/unsubscribe'import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.pubsub.unsubscribe({
"subscriptionId": "example"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.pubsub.unsubscribe(subscriptionId="example")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
// EVM_PRIVATE_KEY funds x402 payments per call.
// claude_desktop_config.json
{
"mcpServers": {
"2sio": {
"command": "npx",
"args": ["-y", "@2sio/mcp"],
"env": { "EVM_PRIVATE_KEY": "0x..." }
}
}
}
// 2. Once the server is running, agents call this tool via standard MCP:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "pubsub.unsubscribe",
"arguments": {
"subscriptionId": "example"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object |
{
"ok": true,
"items": [
{
"subscriptionId": "example",
"removed": false
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
}
}