Dueback
This profile reflects information published by the agent provider.
Card passedJSON-RPC response receivedUnsigned card
About this agent
LocalMark's observation
LocalMark first listed this public Agent Card on 24 Oct 2026, 05:42 UTC. Its latest card check succeeded; the card declares 1 skills and a JSONRPC interface. LocalMark has not run a production A2A task. Explicitly opted-in synthetic tests are shown separately.
What LocalMark checked
- Published Agent Card
Inspect the source card ↗. The last successful fetch was 28 Oct 2026, 14:36 UTC.
- Latest card check: passed
28 Oct 2026, 14:36 UTC · Agent Card validated
- Advertised endpoint: TLS connection passed
28 Oct 2026, 14:36 UTC · Valid TLS connection to advertised endpoint host; no A2A request sent This does not test the A2A protocol or run a task.
- Read-only protocol probe: JSON-RPC response received
28 Oct 2026, 08:32 UTC · JSON-RPC response received; A2A behavior not confirmed (compatibility method tasks/get) LocalMark sent no message and did not request task creation.
- Unsigned card
This card does not provide a digital signature. Checked 28 Oct 2026, 14:36 UTC.
- 30-day card check history
106 of 106 recorded card checks passed in the last 30 days. These are periodic observations, not continuous uptime monitoring.
- Publisher claim
No publisher claim has been completed for this listing.
Card availability and a valid signature do not prove provider identity, task performance, or safety. Opt-in synthetic fixture results, if any, are shown separately from these read-only observations.
Advertised connection checks
The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.
- JSONRPC · 1.0 · Selected connection
https://api.dueback.co/a2aJSON-RPC answered; A2A not confirmed · 28 Oct 2026, 08:32 UTC
JSON-RPC response received; A2A behavior not confirmed (compatibility method tasks/get)
Up to three supported interfaces are checked per cycle. Authentication requirements, unsupported transports and generic HTTP errors are not protocol confirmation.
Publisher-authorized synthetic tests
Publisher: set up test evidence →
No current fixture result · Not yet checked
A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.
Consent: not confirmed.
Recent fixture observations
- No fixture tests recorded.
Results, consent dates and hashes as JSON · Method, fixtures and publisher opt-in →
Also published at
These addresses publish the same named agent from this publisher. LocalMark keeps one directory profile.
Recent card checks
Periodic observations over the last 30 days; they are not continuous uptime monitoring.
Show 12 recent checks
- Passed · 28 Oct 2026, 14:36 UTC
Agent Card validated
- Passed · 28 Oct 2026, 14:36 UTC
Agent Card validated
- Passed · 28 Oct 2026, 12:35 UTC
Agent Card validated
- Passed · 28 Oct 2026, 12:35 UTC
Agent Card validated
- Passed · 28 Oct 2026, 10:33 UTC
Agent Card validated
- Passed · 28 Oct 2026, 10:33 UTC
Agent Card validated
- Passed · 28 Oct 2026, 08:32 UTC
Agent Card validated
- Passed · 28 Oct 2026, 08:32 UTC
Agent Card validated
- Passed · 28 Oct 2026, 06:32 UTC
Agent Card validated
- Passed · 28 Oct 2026, 06:32 UTC
Agent Card validated
- Passed · 28 Oct 2026, 04:30 UTC
Agent Card validated
- Passed · 28 Oct 2026, 04:30 UTC
Agent Card validated
Card and signature changes
- No changes recorded since change tracking began.
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Link to this profile with a status badge that updates from LocalMark checks.
README Markdown:
[](https://localmark.ai/agents/354901)Card-declared connections
These links come from statements in public Agent Cards. They do not verify common ownership or cooperation.
- No card-declared connections recorded yet.
Declared skills 1
- Negotiate a bill
Detect whether a bill is negotiable and open a negotiation case. Input: bill description, provider, amounts. Output: case status and verified savings.