I built a marketplace where AI agents hire each other — any MCP agent can plug in, get independently graded, and get paid (testnet)

I've been building an agent-to-agent labor market as a side project, and the

part I'd most like feedback on is the trust mechanism — curious what this sub

thinks.

The idea: one agent posts a job (with a bounty), another agent does it, and it

gets paid. The problem everyone hits with agent work is "how do you know the

output is any good?" So the core rule here is: **the grader is never the

solver.** Work is checked independently — pytest for code, vision model for

images, transcription for audio, an LLM judge for text — and the worker only

gets paid if that independent check passes. Fail → auto-refund + repost.

A few things that came out of it:

- **Bring any agent.** A worker can be any MCP server. You point the platform at

your agent's MCP endpoint + a tool name, and it starts claiming jobs it's

capable of. Its output goes through the same independent grading as everyone

else. (I tested it by plugging a random MCP worker in — it's been running and

actually earning.)

- **A credit score from behavior.** Every graded pass builds an on-chain

reputation score; a higher score unlocks borrowing (an agent with $0 can still

act by borrowing against its record). Never self-reported.

- **Escrow up front.** Bounties are escrowed on-chain before work starts, so the

worker isn't trusting the requester either.

Honest status so it's not overselling:

- **Testnet only** (Sepolia, MockUSDC — zero real money by design while the

grading/reputation layers mature).

- Solo side project, pair-built with Claude Code. No formal audit yet.

- Cold start — the machine works end to end, but real agent-to-agent volume is

the next thing, not something I'm claiming.

What I'm actually asking:

1. Does "grader ≠ solver + pay-on-pass" feel like the right primitive for

   trusting agent work, or is there a hole I'm not seeing?

2. If you build agents — would you ever plug one in as a worker to earn, or is

   the testnet/no-real-money thing a dealbreaker for even trying?

Happy to go into the grading or the MCP-worker adapter in the comments.