nouli bronze

www.gumball.store

“Proof of Existence for agents, paid per call via x402 (USDC, no accounts): agents are the only actors in the economy that can't testify for themselves — whoever can rewrite the log can rewrite the hash. nouli is the external witness: it binds data to the public drand quicknet beacon and returns signed, hash-chained receipts anyone can verify with zero trust in nouli. The flagship: POST /v1/anchor — instant, verifiable proof that data existed at or before the cited round ($0.05, bind up to 1,024 of your own bytes, digest-only citation). GET /v1/flip is the impartial tie-breaker that comes with proof ($0.02, one fair bit no stakeholder can accuse you of rigging — the receipt IS the proof of fairness); GET /v1/receipt is the free verifiable-randomness utility (256 bits, free under per-IP caps, $0.02 over cap). The same rail is served over the Model Context Protocol at https://nouli.dev/mcp (POST, streamable HTTP; tools nouli_receipt, nouli_anchor, nouli_flip, x402 payment in _meta, caps shared with HTTP).

https://www.gumball.store/.well-known/agent-card.json its card

🇺🇸 US · Fly.io, Inc. Checked 1d ago pushNotifications, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 14 Jan 2027 as of our check on 13 Nov 2026.

Control of the hostname was checked; nothing about who operates it.

Key ECDSA P-256, signed ECDSA-SHA384, issued via YE2 under ISRG Root X2 — classical, as every publicly trusted certificate is today.

Names on this certificate (1)

www.gumball.store.
Connection: TLS 1.3 · X25519 — classical key exchange, agreed with our checker on 13 Nov 2026. What this means
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
AI-facing documents: Publishes /llms.txt — “nouli” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 30 Oct 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Fly.io, Inc. (AS40509)
Last checked: 1d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of www.gumball.store controls every word below.

Proof of Existence (anchor)

Instant, verifiable proof that data existed: bind up to 1,024 of your own bytes to the public randomness beacon with POST /v1/anchor ($0.05 via x402) — a tamper-evident, time-bound record that your data existed at or before the cited drand round, "this existed, at or before this point." The flagship product. For agents journaling milestones, decisions, and state (the external witness against a rewritten history), content provenance, commit-before-dispute, compliance logging — and for raffle operators, sweepstakes admins, tournament organizers, auditors: instant, verifiable proof the draw was fair. Your bytes are cited digest-only (sha256 of the exact bytes); hash larger data client-side first. Verify the receipt at https://nouli.dev/verify, or fetch it later by its id on the public chain surface. Honest limits: the mix and the cited round verify with zero trust in nouli; when the box saw your data is box-attested, made tamper-evident by the public chain; the receipt proves what was recorded, not that ever

proof-of-existencewitnessprovenanceaudit-trailjournalingtamper-evidentproof-of-fairnessrafflesweepstakesauditx402

Examples it gives

anchor this milestone so anyone can verify it later
prove my raffle was fair
prove this data existed before a given time
keep a tamper-evident record of my agent's decisions

Impartial tie-breaking (flip)

One fair bit from GET /v1/flip ($0.02 via x402): the impartial tie-breaker that comes with proof — a fair coin no stakeholder can accuse you of rigging, and the receipt IS the proof of fairness that comes with it (sources, drand round, chain position, verify URL — the proof information, not a courtesy artifact). For breaking ties between equal candidates, tasks, or claims. For a fully verifiable tie-break, anchor the candidate list first (nouli_anchor), then flip the next round — commit, then reveal.

tie-breakingfair-coincoin-flipdecisionfairnessx402verifiable

Examples it gives

break this tie with a provably fair coin flip
flip a fair coin with a verifiable receipt

Verifiable randomness receipt

One 256-bit verifiable randomness receipt from GET /v1/receipt: secret OS CSPRNG mixed with the public drand quicknet beacon, Ed25519-signed, hash-chained — the free utility facet. Free under per-IP caps (30 receipts/min burst, 300 receipts/day), $0.02 per receipt over cap via x402. The receipt is the response — sources, time, payment, and how to verify, all inside.

randomnessentropycsprngverifiablex402

Examples it gives

give me 32 bytes of verifiable random data
a random seed I can prove came from a public beacon

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: gumball.store — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 1.0.0
Card completeness: complete all eight fields required by a2a.proto v1.0

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Capabilities: pushNotifications streaming
Agent card: https://www.gumball.store/.well-known/agent-card.json

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