Pricing

Searching this index, being listed in it, the console and the data feeds are free, without a key, with no time limit. What costs money is speed and depth: a listing today instead of after review, searches an agent runs at scale, and the full reports. Paid in USDC on Base over x402, or in USDT, USDC, BTC, ETH or 200+ coins at the crypto checkout. Position is never sold.

Priority listing

5.00 USDC, once

The same verification, listed now instead of within 30 days. Free listing stays free.

Pay with crypto

Agent search

0.10 USDC a search

Past 2 free a day per door (federated REST, MCP, A2A); 20 with a key. Local search stays free, 200 a day.

ard.json done for you

9.00 USDC, once

Built from your live endpoints, hosted, and listed at once. Charged only if we built one.

Pay with crypto

Demand report

2.00 USDC a report

Every query that returned your entries, with your rank. Totals and the top 2 are free.

Pay with crypto

Credits

5 to 250 USD

On a key: Pro allowances while it holds 1,000 or more, agent searches past the free allowance, monitoring renewals. Never expire.

Buy with crypto

Free, no key

Verified, also free

Prove you control a domain with one DNS record and you get a key. The same features, allowances about six times higher (300 submissions and 200 audits an hour), 30 days of rank history rather than 7, and a search made with the key is not logged at all.

Listing

A free submission is verified the moment it arrives and listed within 30 days. A priority listing is the same verification, listed now, for 5.00 USDC: the answer to a submission carries the offer, every door (REST, MCP, A2A, the SDKs and the submit page) can pay it, and a person can pay from a browser wallet. Priority buys the speed of review and nothing else: it does not move a result, and the review a free submission gets is the same review. Or pay in USDT, USDC, BTC, ETH or 200+ coins: crypto checkout.

Agent search

An agent that searches through this index at scale pays per search past its free allowance: 2 a day on each door, 20 with a verified key, then 0.10 USDC a search over x402, or from credits. The answer that asks for payment says so in words, for the person who runs the agent, and says what to do. Local search (federation: none) stays free, 200 a day, so any client can still check that this is a conformant registry. Paying changes how many searches you get, never what they return.

For publishers

Demand report, 2.00 USDC. /demand shows, free, how often a search returned your entries and the top 2 queries. The full report lists every query with your best and average rank. A domain with nothing more to show is answered in full, for nothing.

ard.json done for you, 9.00 USDC. We read what your domain already serves (an MCP server, an OpenAPI document, an agent card, llms.txt), write your manifest from it, host it at /m/your-domain.json, and list every endpoint at once. If there is nothing to build from, nothing is charged.

Your wallet signs a USDC authorisation on Base; our own x402 facilitator settles it only after the manifest is built. Agents: POST /manifest/service over x402.

Credits: pay as you go

One prepaid balance, Neuronto credits, pays for everything past the free allowances, with no signature per call. One credit is $0.001. Packs: $1 for 1,000, $5 for 5,000, $20 for 22,000, $50 for 60,000, paid in USDC over x402. A verified domain key starts with 1,000 credits, once per domain.

Pro, self-serve

Any key holding 1,000 credits or more gets the Pro allowances: about 5 times its base allowances, 90 days of rank history, and metering you can read at /me. Nothing to sign and nobody to ask.

Publisher monitoring

We watch your domain and tell you by webhook when an endpoint stops answering or starts asking for credentials, when its tools change, when your manifest breaks or moves, or when you lose a position on your own queries. $19 (19,000 credits) a month per domain, the first 14 days free. Start the free trial.

Charge for your own API

The gateway puts any HTTPS API behind x402 without changing it: buyers pay your wallet directly, 1,000 paid calls a month are free, then 1% of each payment from your credits. Being listed in this index is never part of any price.

Enterprise: a private registry

Your organisation's internal services, discoverable by your own agents, in their own tables, never mixed with the public index and never ranked against it. 250 USDC a month, paid over x402 with your key (POST /enterprise): it adds 300,000 credits to the key, which keeps it on Pro allowances for federated search, audits, builds and the full reports at scale. The private index itself (/private/entries) stays free with any verified key. Credits never expire. Nothing in it touches public position.

What we do not measure, and will not pretend to

There is no search-volume figure anywhere here. Nearly every query this index has ever served was our own test suite or a scanner, so a volume number would be our traffic sold back to the person who most needs it to be true. /demand reports the real count, which today is usually zero, and says so; the paid report is that same count in full, never an estimate. Positions we can measure honestly; demand we cannot, yet.

What is never for sale

Position. A relevance score is relevance only, the specification says it must not be read as trust, and the benchmark this index publishes is worth citing only because its author cannot rig it. There are no sponsored results, no bids for placement, and no paid badges.

A trust or safety verdict. We scanned all tool descriptions in the index and found model-directed text in 0.076% of them, with no override phrasing at all. There is nothing there to score, and a paid badge would be paid position wearing a different hat.

A priority listing does not buy position. It buys the speed of review. A result listed today ranks exactly where it would have ranked after 30 days.

Charging for access is fine. Charging for rank would make everything else here worthless.

Taking payments yourself

A different product from the same operator: pay.neuronto.com is an x402 facilitator. Point any x402 server at it and it checks a buyer's signed stablecoin payment and settles it on-chain; it never holds the money, because the buyer signs the transfer and the facilitator only broadcasts it. Free while it is new. A live endpoint there charges a tenth of a cent and sends it straight back in the same request, so a client can be run end to end for nothing. Nothing about this index changes whether you use it or not: position is not for sale here either.

What the open source project gets

Everything a registry is: the index, the crawl, search, federation, submissions, conformance, the badge, the benchmark, the data feeds and the SDKs. Anyone can run a complete, conformant ARD registry from it, for nothing, forever. What is not in it is this layer: the analytics engine, multi-step discovery, and tiers.