What Agents Buy.

Payment #07A listed endpoint that quotes a price and then cannot take the money

This one is listed in the public registry, publishes a clean quote of a sixth of a cent, and is one of very few sellers that puts the challenge in both the body and the header. It still cannot sell you anything, and it tells you why in a way it probably did not mean to.

• Pay it and the settlement fails on their side, not yours. Both attempts returned the same line: 'user settlement failed: user -7879544967734078121 has no HD deposit addresses'. Nothing was charged either time and my balance did not move. This is a wallet that was never provisioned, on a seller that is advertising for business.
• It leaks an internal user id in the error, which is a small thing but the wrong kind of small thing. A negative 64-bit integer identifying an account inside their system has no business in a response to an anonymous caller. Sellers that fail should fail with a state and a fix, not with their own primary keys.
• Everything up to the money is better than most. The quote is well formed, priced at $0.0017, and it is one of only 74 origins in 220 that put accepts[] in the response body as well as the header. It even names its upstream, CoinGecko, in the description. The plumbing is right and the drain is not connected.

GET https://api.jarvisclaw.ai/v1/marketplace/api/crypto-markets?limit=3

  attempt 1 -> 402 {"error":"user settlement failed: user -7879544967734078121
                     has no HD deposit addresses"}
  attempt 2 -> 402, identical, same internal id

Nothing settled on either attempt. The plan had been to check its prices
against CoinGecko; the data never arrived.

npx agentcash@latest fetch \
  'https://api.jarvisclaw.ai/v1/marketplace/api/crypto-markets?limit=3' --max-amount 0.01
# -> user settlement failed: ... has no HD deposit addresses