SWARM is an autonomous agent on a small rented server that sells tiny pay-per-call services to other AI agents over x402, paid in USDC on Base [1]. After its first month, listed in almost every place an agent might look, it had 18 payments on its books: 17 of its own test purchases and 1 from an automated inspector, and zero from outside buyers [1]. Its operator now refuses to build any new product until a comparable seller shows repeat paying buyers on-chain [1].
What does SWARM (x402 shop for other agents) sell, and to whom?
Pay-per-call x402 APIs for AI agents, from $0.002 to $0.99 a call.
Other AI agents, not people: clients that can complete the x402 handshake, where the server answers '402 Payment Required' with a price and the client pays in USDC and retries [1]. The operator plans a second track from Oct 26 selling to people instead of machines [1].
How was SWARM (x402 shop for other agents) built?
An always-on agent on a rented server with its own wallet [3]. The shop handles the full loop: quote, payment check, work, charge only if the work succeeds, receipt [1]. It is wrapped as an MCP server on npm so Claude or Cursor can call it, and publishes an ERC-8004 agent card and an x402 manifest [3][1]. A morning script reconciles the ledger so the buckets visibly add up to the total, and a status page is regenerated from nginx logs [1][2]. Outreach is done by hand by the operator; the agent does not contact anyone or spend money [1].
What is the business model?
Micropayments per call. The catalog lists utilities at $0.02, a GitHub repo health check at $0.05, a live-researched summary at $0.75 and a full sourced report at $0.99, plus newer site-check and read-page calls at $0.002 [3]. The operator's math: with the agent idle, about 14 sales of $0.02 a day would cover fixed costs; with it thinking at full speed you would need twenty times that [1].
Where does the traffic come from?
Directories and registries: Coinbase's Bazaar, x402scan, AgentCash, x402-list, Glama, mcprush, the official MCP registry and npm [1]. Visibility brought bots, not buyers: of 21,316 requests in a week, 19,371 came from known bots [1]. The live status page shows 3,567 requests to the paid services, of which 3,521 got a 402 price quote and 9 completed with payment, most of them scanners and monitors [2]. SWARM also makes test purchases partly because Bazaar delists services after 30 days without payments [1].
What revenue has SWARM (x402 shop for other agents) reported?
Reported revenue: $0 from outside buyers after one month, per Month-one report on dev.to (2026-10-15).
- 2026-10-01An automated checker, vet402, buys one $0.02 call to verify delivery [1]
- 2026-10-09First 'arena' round of competing agents picks a trademark checker, later dropped [1]
- 2026-10-15Month-one report: 0 outside sales [1]
- 2026-10-26Planned start of Track B: selling to people instead of machines [1]
- 2026-11-15Planned review checkpoint on sales, product and budget split [1]
What does the agent do, and what does the human do?
- Runs the shop: quotes, verifies payment, does the work, issues receipts
- Researches and writes the paid summaries and reports
- Runs an 'arena' of competing agents to propose the next step
- Keeps a reconciled ledger and publishes a status page from server logs
What does it cost to run?
About $1.5 a day for thinking with a hard cap of $2, and about €7.50 a month for server and domain, both paid by the operator [1]. Total spend since day one and the operator's weekly hours are not measured yet, which the operator flags as a gap [1].
What worked and what didn't?
- Demand: zero outside buyers in a month [1]
- Bad inputs: the prompt wrongly told the agent it had $0.51 left, so it slept 4 hours to save money [1]
- Security: a paid endpoint could be bypassed with one word in the URL, caught in review [1]
- Thin products: the first 'report' was one model call with no web search [1]
- Ops: an expired API key left the agent unable to think for about 30 hours with no alert [1]
How do you replicate SWARM (x402 shop for other agents)?
- Before building, check on-chain that a comparable seller has 5+ repeat buyers in 30 days
- Exclude your own probes and sweeper wallets from any demand number
- Charge only after the work succeeds
- Keep real controls outside the agent: firewall, signed spending caps, human review
- Alert on credential expiry and on the payment rail itself
- Run a parallel track that sells to humans
What are the risks and the moat?
The agent-to-agent market is small and concentrated: the operator cites graded.sh's August count of 292,967 paid calls in 30 days, with the top ten services taking about 80% and a median price of $0.01 [1]. Demand data is noisy because sellers often use one wallet for many products [1]. Much x402 volume is on Solana, which SWARM did not accept yet [1]. Compare Krimskrams on this site, which reached $1.54 in 21 days in the same market.
FAQ
How much has SWARM earned?
Nothing from outside buyers in its first month. Its 18 payments were 17 of its own tests and one automated inspector [1].
What does it sell?
Pay-per-call services for agents over x402, from $0.002 site checks to a $0.99 sourced research report [3].
What does it cost to run?
About $1.5 a day of model spend (capped at $2) and about €7.50 a month for server and domain [1].
What happens next?
No new product until a comparable seller shows repeat buyers on-chain, a human-facing track from Oct 26, and a review on Nov 15 [1].
Sources
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