Verifyum proof service bronze

verifyum.com

“Hosted Verifyum MCP endpoint with three remote-safe tools. File hashing, nonce generation and private-manifest construction must happen on the caller machine. Send only a completed commitment, an idempotency key, or a public proof ID. A finalized Verifyum anchor demonstrates that a commitment to exact file bytes existed no later than the estimated Solana block time. It does not prove authorship, ownership, legal signature validity, when the file was first created, or whether statements inside the file are true.

https://api.verifyum.com/mcp its card

🇳🇴 NO · ServeTheWorld AS Checked 5d ago tools

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 27 Jan 2027 as of our check on 9 Nov 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.

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

Key ECDSA P-256, signed ECDSA-SHA384, issued via YE1 under ISRG Root X2 — classical, as every publicly trusted certificate is today.

Names on this certificate (2)

*.verifyum.com, verifyum.com.
Connection: TLS 1.3 · X25519 — classical key exchange, agreed with our checker on 9 Nov 2026. The agent is served from api.verifyum.com, so that server's operator chose this. What this means
DANE / TLSA: Not verified
Discovery: Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 10 resources. The catalog's entries are the publisher's claims, not something agenttru.st verified.
AI-facing documents: Publishes /llms.txt — “Verifyum” 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: 4 Oct 2026

View verification details

Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: MCP verified by handshake or card fetch, not merely advertised
Hosted in: 🇳🇴 NO · ServeTheWorld AS (AS34989)
Last checked: 5d 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 verifyum.com controls every word below.

This card declares no skills. That is not a fault — the field is optional, and an agent can be perfectly functional without describing itself.

What kind of listing

No skills declared: Its card declares no skills, or, for an MCP server, listed no tools.

Checked by agenttru.st against this listing's hostname and card — facts about a name or an address, not about what the agent does. How kinds are decided.

What its catalog declares

From the ARD catalog this host publishes at /.well-known/ai-catalog.json. The operator controls every entry; agenttru.st verified that the catalog exists and parses, and nothing about what the entries say.

Verifyum proof of existence

mcp-server-card

Free, account-free timestamp and integrity proof for files and AI decision records, anchored on Solana Mainnet. Nothing is uploaded: the caller hashes locally and sends only a domain-separated commitment.

https://verifyum.com/.well-known/mcp/server-card.json

Verifyum public proof API

vnd.oai.openapi

OpenAPI 3.1 description of the keyless public API: anchor a locally computed commitment, read proof lifecycle, and read optional witness membership.

https://verifyum.com/openapi.json

Verifyum skill for agents

text/markdown

When an agent should create a proof, when it should not, the cost and rate etiquette, and the shortest integration path over MCP or a single-file client.

https://verifyum.com/skill.md

Agent decision record schema

schema

Recommended JSON shape for the private document an autonomous system seals: system instructions, prompt, model and parameters, tool calls and output. The document stays local and is never sent to Verifyum.

https://verifyum.com/schema/agent-decision-record-v1.json

Verification specification v1

text/markdown

Every step from the raw file to each attestation, byte for byte: the manifest canonicalization, the domain-separated commitment, the memo format, the Ed25519 signed input, the Merkle prefixes for both trees, and what is checked against what for each witness channel. Written so a third party can implement a verifier from it alone.

https://verifyum.com/spec/v1

Standalone offline verifier

text/x-python

One Python file, standard library only, that takes an original file and a receipt and checks the whole chain with no network and no dependency on Verifyum. Intended for anyone who has to satisfy themselves without trusting the operator.

https://verifyum.com/clients/verifyum-verify-standalone.py

And 4 more entries in the catalog, not shown here.

Technical agent card

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

Protocol: mcp
Version: 0.1.0

View all card details

Capabilities: tools
Agent card: https://api.verifyum.com/mcp

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