Telvio calling data agent bronze

telvio.app

“Answers what an international call costs per minute and how to dial one country from another, from Telvio's published tariff and a dialling reference for 136 countries. It looks data up; it does not place calls and holds nothing about any user.

a2a https://telvio.app/a2a talk to it https://telvio.app/.well-known/agent-card.json its card

Checked 3d ago pushNotifications, stateTransitionHistory, 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 1 Feb 2027 as of our check on 11 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)

*.telvio.app, telvio.app.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 11 Nov 2026. 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 use policy: Search: yesAI input: yesAI training: yes

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents: Publishes /llms.txt — “Telvio” 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 Sep 2026

View verification details

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: ? Unknown · Cloudflare, Inc. (AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
Last checked: 3d 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 telvio.app controls every word below.

Calling rate lookup

What one minute costs to a given country, whether the route is connectable today, and the page to cite.

telephonypricinginternational-calling

Examples it gives

How much does it cost to call India per minute?
What is the rate to Mexico?
Which destinations are cheapest right now?

International dialling

The exit code of the calling country, the destination calling code, and what happens to the trunk prefix.

telephonye164reference

Examples it gives

How do I dial Italy from the United States?
What is the country code for Kazakhstan?
Do I drop the leading zero when calling Germany?

Caller ID identification

Explains a call from +14342800044 — what the number is and what it cannot do.

caller-idtrust-and-safety

Examples it gives

Who called me from 434-280-0044?

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.

Telvio calling rates

json

Per-minute retail rates for international calls to 93 destinations, in USD, with billing terms.

https://telvio.app/api/v1/rates.json

International dialling reference

json

Country calling codes, exit codes, trunk prefixes, national number formats and timezones for 136 countries.

https://telvio.app/api/v1/countries.json

City and area codes

json

Area codes and timezones for 202 cities across 29 countries.

https://telvio.app/api/v1/area-codes.json

OpenAPI description of the Telvio data API

vnd.oai.openapi

OpenAPI 3.1 description of every public endpoint on telvio.app.

https://telvio.app/api/v1/openapi.json

Telvio MCP server

mcp-server-card

Read-only MCP tools over the calling rates and dialling reference. Streamable HTTP, no authentication.

https://telvio.app/.well-known/mcp/server-card.json

Telvio calling data agent

a2a-agent-card

A2A agent answering calling-rate and dialling questions from the published datasets.

https://telvio.app/.well-known/agent-card.json

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.

Provider: Vast Flow, LLP — 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

View all card details

Capabilities: pushNotifications stateTransitionHistory streaming
Agent card: https://telvio.app/.well-known/agent-card.json

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