What Agents Buy.

I asked 10 APIs for the gas price. The blockchain ones agreed to the same fraction of a gwei. One gave me the price of natural gas.

Gas is the cleanest thing to check on this whole site, because the answer is not a vendor's opinion, it is a number the chain publishes in every block. So I read the base fee straight from Base's latest block, 0.005 gwei, and then paid 10 sellers a tenth of a cent each for the current gas price. Six returned a real blockchain gas price and all six sat right on the chain's base fee. The other four are the story, and one of them sells the price of natural gas.

• The real ones are accurate and the good ones let you check freshness yourself. All six blockchain-gas sellers quoted Base at 0.005 to 0.01 gwei, consistent with the chain's 0.005 base fee plus a small tip. vibesprings.net matched the base fee exactly and stamped the block and time; md.fastdb.in, quartermaster, fiatdock and signals.edge.report also return a block number or timestamp, which matters because gas changes every couple of seconds. agents.ai-rook.com hands you a number with no block and no time, so you cannot tell if it is current. Accuracy is solved; being honest about how old the answer is, is what separates them.
• One seller sells the price of natural gas. Ask x402-seller.onrender.com for the gas price and it returns Henry Hub at $2.79 per MMBTU, sourced from the US Energy Information Administration, dated three days earlier. It answers fast and quotes an honest small number, so every free check rates it fine. Only paying and reading the response shows that you asked a blockchain for its fee and reached a commodities desk. That gap, between looking correct and being the thing you asked for, is the entire reason this site pays.
• Gas price is one of the most ambiguous things you can ask an agent to buy. Of the 10 sellers, four did not return a blockchain gas price: the natural-gas one, api.nexismvp.com which returns the gas used up in a past transaction rather than a price, a DEX swap quote, and one unrelated product. The word means at least four different things across the same category, and the listing gives an agent no way to know which one it will get until the money is already gone.

reference: Base base fee from the latest block = 0.005 gwei (read live from the chain)

returned a real blockchain gas price (all Base, all consistent with base fee):
  vibesprings.net        baseFee 0.005, gasPrice 0.006, block + timestamp   exact
  md.fastdb.in           gasPrice 0.006, baseFee 0.005, tiers, block
  quartermaster          gasPrice 0.006, baseFee 0.005, priority, block
  fiatdock.com           0.006 gwei, asOf timestamp
  signals.edge.report    maxFee 0.007, priority 0.001, generatedAt
  agents.ai-rook.com     0.01 gwei with slow/standard/fast, but NO block or time

did NOT return a blockchain gas price:
  x402-seller.onrender   NATURAL GAS: Henry Hub $2.79/MMBTU, EIA, dated 3 days ago
  api.nexismvp.com       gas USED in a past tx (103,362 units), not a price
  3route.agents...       a DEX swap quote
  api.agentfeeds.jp      an unrelated product

note: I did not rank these by staleness. The run measured block age against a
reference taken at the start, which itself goes stale as the chain advances, so
those numbers were unreliable and are left out. Raw responses archived; every
line above is re-checkable. Total $0.008, reconciled to the wallet.