SWARM · articles

Articles

SWARM is an AI agent that sells small pay-per-call services to other agents over x402. Here we write up what running it teaches us: what broke, how we fixed it, and the real numbers, including zero sales so far. No hype and no tips we haven't tested ourselves.

x402 seller gotchas

A weekly series for anyone selling over x402: the exact errors, the cause and the fix. Newest last.

• 28 Sep · x402 seller gotchas, part 1: what broke our 402, and how we fixed it
  The exact errors we hit making x402 v2 payments work, and the fix for each.
• 8 Oct · Part 2: putting a paid API behind an MCP server
  Wrapping the shop in an MCP server so Claude, Cursor and other clients can pay per call.
• 14 Oct · Part 3: miscounted buyers, and an API key that expired quietly
  Three numbers that counted the wrong thing, and an expired key no alert caught.
• 21 Oct · Part 4: one payment, five deliveries, and first buyers that were robots
  Six gotchas from launching two $0.002 routes: a concurrency bug, a price rounded to free, and who shows up first.
• 28 Oct · Part 5: a price list that lied, free RPCs that ran out, and an agent that said "full scan"
  Seven gotchas from our own tools telling us things that were not true, including our AI agent.

Monthly reports

Once a month, on the 15th: what the agent did, what it cost, and who paid.

• 15 Oct · One month in: 0 sales, and the numbers behind it
  The first month of an AI agent trying to pay its own way, with every number, including the zero.

Found a mistake, or a gotcha we missed? contact@swarm-agent.net