Worked walkthroughs

Pick what you need to prove and read the calls that prove it. Every page ran for real against api.s2ar.dev, and a script re-derived every number before it published one: it re-hashed each receipt, fetched each Assay record back and checked it against the published key, and showed a tampered copy failing. Rerun on every publish; the run stamp is on each page.

Records re-verified across these runs: 30 ▲6

Start with An agent’s day: read a function, write a summary, refuse to ship it unasserted, certify the screenshot, verify every record you were handed. Then pick a card.

Check an answer

Assert an agent's outputpartial · 2 records verified3 calls · $0.01 list · 338 ms Assert a price answerpass then partial · 3 records verified4 calls · $0.01 list · 607 ms Score a sonnet: evidence, not opinionpass then fail · 3 records verified3 calls · $0.015 list · 560 ms Verify a stranger's claimpass · a tampered copy fails · 2 records verified4 calls · $0 list · 539 ms

Look at pixels

Extract the textdelivered3 calls · $0.02 list · 1,414 ms Certify a screenshotpass · 2 records verified2 calls · $0.02 list · 4,922 ms Diff two screenshotspass then fail · 3 records verified3 calls · $0.01 list · 1,532 ms

Read code

Read the function, not the filedelivered3 calls · $0.02 list · 926 ms List the file before you read itdelivered2 calls · $0.005 list · 692 ms Find it by meaningdelivered2 calls · $0 list · 3,558 ms

Pay and verify

Pay per call, with no accountdelivered2 calls · $0.005 list · 323 ms Every paid route takes GETpass · 3 records verified4 calls · $0.02 list · 1,764 ms Settle with USDCdelivered2 calls · $0.005 list · 1,631 ms Inspect an x402 endpointpass then fail · 2 records verified3 calls · $0.01 list · 1,065 ms Read the proceedings like a routerdelivered1 call · $0 list · 126 ms

Train and prove

Play an environmentpass · 4 records verified10 calls · $0.04 list · 1,414 ms Audit a rewardpass · 2 records verified5 calls · $2 list · 865 ms

The agent’s day

An agent's daypartial then pass · a tampered copy fails · 3 records verified6 calls · $0.02 list · 5,691 ms An agent with the plugindelivered3 calls · $0.01 list · 22,509 ms

Research

What a passing poem has to survive: The score verdict, gated: the inputs that exposed the lenient composite on 2026-10-10, before and after, with records.

The agent markets, measured: A daily snapshot of where agents pay: who gets paid, what it costs, where evidence sells, and where s2ar sits.

The proceedings, as a series: Every signed edition of the issuer’s own day: calls, paid, delivered, credited, payers, refused — one point per edition.

Token economics: What an agent pays per call against what a session costs, from the published prices and two paired benches.

Certificates: the bands, the witness, the replay: The per-model bands the landing serves, where the witness over-certifies, the bake-off, and how a record is replayed.

Try them yourself

Run the same calls from your browser, on today’s free samples or your own key, in the live demos: inspect your own endpoint · score a text · verify a record · map a repository · certify an image · diff two screenshots · extract the text · play an environment · audit a reward · assert an output · inspect an x402 endpoint.