How Much Should an API Call Cost an AI Agent? anchor it, don't guess it.
Per-call pricing has no pricing-page theater to hide behind — the number is the whole offer. Benchmarks by call type, and the reasoning to pick yours.
When an agent decides whether to call your endpoint, there is no sales conversation — just a price in a 402 response and a budget in the agent's policy. Set the number too high and the call never happens; too low and you subsidize someone else's product.
The good news: per-call prices are easier to reason about than subscription tiers, because each call has a knowable cost and a comparable alternative. Work through three anchors — your cost, the buyer's alternative, and the agent's budget — and the range gets narrow fast.
Anchor one: your marginal cost
Price floors come from what one call costs you: compute, upstream API fees, data licensing, and bandwidth. A tool that proxies a paid upstream — say a $0.002 LLM call or a metered search API — must price above its blended per-call cost or every success loses money.
Loomal's minimum price is $0.01 per call, which conveniently sits above the marginal cost of most lookups and light transforms. If your true cost per call exceeds a cent, that is a signal you are in a higher band, not that you should round down.
Anchor two: what the call replaces
The honest comparison is the buyer's next-best option. If an operator could get equivalent data from a $49/month subscription they would use 5,000 times, your ceiling is around a cent per call; if the alternative is a human doing ten minutes of work, a dollar per call is still a 90% discount.
This is why 'specialized' beats 'fast' in pricing power. Commodity lookups compete with free tiers everywhere; a call that returns vetted, structured, hard-to-source data competes with analyst time.
The bands, as of mid-2026
Observed per-call pricing for agent-facing endpoints clusters into rough bands. Commodity lookups and conversions: $0.01–0.02 — the floor band, viable on volume. Search, scraping, and standard enrichment: $0.01–0.05 per query or page. Specialized data and verified records (company data, compliance checks, niche datasets): $0.05–0.50. Heavy compute and synthesis — OCR on long documents, transcription, generated reports: $0.10 to several dollars, often priced per unit (per page, per minute) rather than per request.
Treat these as starting brackets, not answers. Your position inside a band is set by the two anchors above.
Anchor three: the agent's task budget
Agents spend within budgets their operators set — commonly cents to a few dollars per task. Your call is one line item in that budget, competing with every other tool the task needs. A $0.25 call inside a $0.50 task budget had better be the centerpiece; a $0.01 call barely registers and gets used freely.
Practical consequence: if your tool is called many times per task (per page, per row, per query), price low and let volume work. If it is called once per task and carries the outcome, capture more of the task's value.
Pick a number, then move it
Per-call pricing on Loomal is repriced in a single field, so the cost of a wrong first guess is days of data, not a plan migration. Launch in the band your anchors point to, watch calls and conversion in the console, and adjust. Sellers consistently learn more from two weeks of live price changes than from any amount of pre-launch deliberation.
One thing not to do: there is no $0 tier. The minimum is $0.01, and Loomal's fee is 5% on settled transactions, currently waived — so the price you set is effectively what you keep.
FAQ
Why not price below a cent for high-volume tools?
Loomal's per-call minimum is $0.01, and in practice sub-cent prices signal commodity status without buying you meaningful volume — an agent that will call you 10,000 times at $0.002 will almost always call you 10,000 times at $0.01 too. If the unit feels too small, batch it: price per 10 lookups instead.
Should the same tool cost different amounts for different inputs?
Yes, when cost scales with input. x402 lets you quote the price per request, so a 3-page document and a 300-page document can pay proportionally. Keep the formula predictable and documented — agents and their operators plan around prices they can compute in advance.
How do I know if my price is too high?
The blunt signal is calls: agents query the index, see your price, and either pay or don't. If discovery traffic is healthy but settled calls are scarce, test a lower band for two weeks. Because repricing is one field on Loomal, this experiment is nearly free.
Does Loomal take a cut of each call?
The fee is 5% on settled transactions and it is currently waived. Settlement is USDC on Base to your wallet in about two seconds per call, with signed receipts, so revenue tracking is exact rather than estimated.
Set your per-call price.
Pick a band, list it, and reprice in one field as the data comes in.