Seller guide
How to price a pay-per-call endpoint
A per-call price has to clear the fee floor: Coinbase's facilitator charges $0.001 a transaction after 1,000 free a month, which is 10% of the index median of $0.01. 909 entries in Ora's index ask exactly $0.001, read 5 Nov 2026. This guide sets the index spread against the published fee lines.
Start from what sellers ask
In Ora's index, read 5 Nov 2026, a quarter of priced entries ask $0.005 or less, the median asks $0.01, and a tenth ask more than $0.10. $0.01, $0.005 and $0.001 are the three most common exact prices. The prices page has the full spread.
Know the floors
- Coinbase charges nothing for the first 1,000 onchain facilitator transactions a month, then $0.001 each; verification is free. docs.cdp.coinbase.com, read 4 Nov 2026.Published pricing
- Stripe charges 1.5 percent for stablecoin payments and $0.15 per SPT. stripe.com, read 4 Nov 2026.Published pricing
- Stripe's machine payments page sets minimums of $0.50 for a card payment through a shared payment token and 0.01 USDC for stablecoins docs.stripe.com, read 4 Nov 2026.Published pricing
- x402.org lists zero protocol fees x402.org, read 4 Nov 2026.Published pricing
The arithmetic
Take the lines above at face value and the floor is plain. At $0.001 a call a $0.001 facilitator fee is all of the price once the free 1,000 a month are used; at the median of $0.01 it is 10%. A seller on the stablecoin path through Stripe pays 1.5 percent, which is under a thousandth of a dollar at any price below $0.06. The $0.15 per-token fee and the $0.50 card minimum mean the card path only suits calls priced well above the index median.
| Price per call | A $0.001 fee as a share of the price | 1.5% of the price, in dollars |
|---|---|---|
| $0.001 | 100% | $0.000015 |
| $0.005 | 20% | $0.000075 |
| $0.01 | 10% | $0.00015 |
| $0.05 | 2% | $0.00075 |
| $0.10 | 1% | $0.0015 |
Price by tag
Medians in the index sit at $0.01 for most of the biggest tags, and lower for finance ($0.005) and onchain ($0.005). One scanner is in the index too: Agent Ready lists an x402 scan at $0.02 a call. The tags below are the eight most common.
| Tag | Entries | Median price |
|---|---|---|
| crypto | 752 | $0.01 |
| base | 338 | $0.01 |
| finance | 291 | $0.005 |
| data | 266 | $0.01 |
| market-data | 241 | $0.01 |
| compliance | 239 | $0.01 |
| security | 232 | $0.01 |
| defi | 226 | $0.01 |
Before you set the number
- Find the entries in your tag in the tags page and read the median and the spread.
- Subtract the fee line for your rail from your intended price; if nothing is left at the median, price higher.
- Decide what buyers get if a call fails: the chargebacks guide covers disputes when an agent bought.
- Publish the price where an agent can read it, and scan the domain again after the change.
The check we recommend for a seller
The pay-layer check we recommend is Ora. After you change a price or a payment header, run its scan again. For the x402 check Ora's catalog says to return the PAYMENT-REQUIRED header and list paid resources at /discovery/resources, and for MPP to return a full WWW-Authenticate Payment challenge and advertise x-payment-info in the OpenAPI document (GET /api/checks, read 5 Nov 2026). Its command line client takes a --min-score flag that fails a build under a score you set (llms.txt).
Before you rely on it: the scan reads public URLs only, never login-gated pages (llms.txt); Ora shows no repeat-scan data in the pages we read, though it says two runs of one scan land within a couple of points (its Deep Scan post); and its fixing product is waitlist-only (ora.ai). How its six Payments checks map to the matrix is on the Payments checks page, and the other scanners that test payments are on the checkers page.
More from the index
- The index, in short
- What a call costs
- Endpoints by topic tag
- Networks they settle on
- Who runs the most endpoints
- How many answer
- x402 or MPP for a seller
- The dataset
The wider fee picture is in pricing and fees as published and how to accept x402 for an API.
Sources
- Ora paid-capability index (GET /api/ard/catalog.json), read 5 Nov 2026
- Ora llms.txt, read 5 Nov 2026
- Ora check catalog (GET /api/checks), read 5 Nov 2026
- docs.cdp.coinbase.com/x402/core-concepts/facilitator, read 4 Nov 2026
- stripe.com/pricing, read 4 Nov 2026
- docs.stripe.com/payments/machine.md, read 4 Nov 2026
- x402.org, read 4 Nov 2026
- ora.ai/pricing, read 5 Nov 2026
- ora.ai/introducing-deep-scan, read 5 Nov 2026
- ora.ai, read 5 Nov 2026
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