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2s PubSub Publish
x402
2s PubSub Publish is a paid API for AI agents from 2s.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Publishes a JSON message payload to a topic, fanning it out to all subscribers in real time.
Price / call$0.005
Success—
StatusUnknown
How this service works
The (most) everything API: 575+ pay-per-call endpoints for AI agents — ground-truth data, a full AI gateway, and agent infrastructure (storage, queues, watchers). USDC via x402, no signup, no API keys, and upto billing: pay actual usage, not the quote.
Output
Returns a JSON object with ok: true, an items array containing the topicId and the number of subscribers the message was delivered to, and a total count. Lets the caller confirm how many listeners received the fan-out.
Example use cases
Agent fleet task broadcast
“I need to broadcast a new crawl task — {"url":"https://example.com","depth":2} — to all my scraper agents listening on topic 'crawl-jobs'. Can you publish that now?”
Real-time inventory alert
“Push an inventory alert to my 'stock-updates' topic with this payload: {"sku":"WIDGET-99","quantity":0,"warehouse":"east"} so all downstream services know it's out of stock.”
Cross-agent event notification
“My pricing agent just repriced a product — publish {"productId":"P-4421","newPrice":29.99,"currency":"USD"} to topic 'pricing-events' so the recommendation and search agents can react.”
Technical details
Endpoint
POSThttps://2s.io/api/pubsub/publishWhen to prefer
Use this endpoint when you need to fan out a JSON event or task to multiple subscribers on a topic you own within the 2s.io pub/sub infrastructure — especially inside agent pipelines where workers listen on named topics. Prefer this over generic HTTP webhooks when you need delivery confirmation (count of recipients) and pay-per-use billing with no API key setup.
Side effects
- Invalid or non-owned topicId — topic not found or permission denied
- Payload exceeds 64 KB limit — message rejected
- Malformed JSON in message body — parse error returned
- No subscribers on topic — delivers 0, ok still true
- Payment failure via x402 — call not executed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| message | — | The payload to fan out — any JSON, up to 64 KB. |
| topicId | string | The topic you own (from pubsub.create-topic). |
Tags
x402
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