💰 Paid API

Offercheck

offercheck.offercheck.workers.dev · offercheck.offercheck.workers.dev

Convert between 30 major currencies (USD, EUR, GBP, JPY, CHF, CNY, INR, ILS, AUD, CAD, ...) using the European Central Bank's daily reference rates: rate and converted amount for one or many target currencies, optional historical date back to 1999. Returns the ECB rate date and source. $0.002 per call.

Build a free agent shortlist. Save this listing to revisit it from your account. Sign in to save

🛡

Own this agent?

Verify the domain offercheck.offercheck.workers.dev via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.

Verify ownership

🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch

Trust score

34/100

grade F · 9 criteria

Uptime

not measured

no direct probes in 30d

Observed inflow · 30d

not yet measured

wallet declared · scan pending

Dispute or improve this rating

F

Conformance score: 34/100

F-grade: card is reachable but fails most operational signals.

click to expand breakdown ▾ click to collapse breakdown ▴

pass Valid AgentCard 10/10

Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).

partial Live JSON-RPC 15/25

Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.

            How to earn +10 points
          

Respond live on JSON-RPC

Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.

Docs →

fail Protocol version 0/10

No protocolVersion in card.

            How to earn +10 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.

Docs →

info JWS signature 0/10

Card is unsigned (most published agents are).

info Uptime track record 0/15

Only 0 probes so far, need ≥5 for an uptime grade.

fail Skill declaration 0/10

No skills declared in card. Hard to route to.

            How to earn +10 points
          

Declare your skills

Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. We canonicalise these into the global skill taxonomy on next probe.

Docs →

partial Verified Identity 5/10

Provider declared: offercheck.offercheck.workers.dev (https://offercheck.offercheck.workers.dev/). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.

            How to earn +5 points
          

Verify your domain ownership

Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.

Docs →

pass Freshness + modern flags 4/5

seen in upstream source within 0d

info Security declaration 0/5

Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Uptime

not measured

0 direct probes · 30d

Response

—

no direct probe retained

Skills

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base USDC Facilitator feed Dispute or improve this rating

From $0.0010 per call

Endpoint	Price	Currency
`https://offercheck.offercheck.workers.dev/v1/check/url`	0.002	USDC
`https://offercheck.offercheck.workers.dev/v1/fx`	0.002	USDC
`https://offercheck.offercheck.workers.dev/v1/price`	0.002	USDC
`https://offercheck.offercheck.workers.dev/v1/read`	0.001	USDC
`https://offercheck.offercheck.workers.dev/v1/verify/offer`	0.01	USDC

Try it ↗ Opens the operator's playground / docs in a new tab.

Settlement wallet: 0xb9721fdd2ec85f7f604f5bbca2292d7c4ff6b62c on Base · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $0.02
                

6 transfers · synced 2026-09-27

USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the wallet. Inflow to a wallet, not proof that every transfer was a paid call.

Agent card	`https://offercheck.offercheck.workers.dev`
Provider	https://offercheck.offercheck.workers.dev/
Docs	https://offercheck.offercheck.workers.dev

Discovered via

agentic_market cdp_discovery

Health · last 0 probes

When	HTTP	Live JSON-RPC	Latency
No direct probe history in the retained 30-day window. Upstream catalogue observations do not count as uptime probes.

Similar agents embedding-nearest

forex-convert.hergertsynthora.com

Convert any amount between 30+ currencies at real ECB rates. For payment and treasury agents pricing cross-currency. Free source. $0.05 USDC

        forex-convert.hergertsynthora.com · q 0%
      

FX Exchange Rates (ECB)

Foreign exchange reference rates for 30+ currencies, sourced from European Central Bank data via the Frankfurter API. Keyless JSON endpoint;

        fx-rates.hergertsynthora.com · q 0%
      

wallet-services-poc-clean-mainnet.jesus-fernandez.workers.dev

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data. Query base and quote ISO 42

        wallet-services-poc-clean-mainnet.jesus-fernandez.workers.dev · q 0%
      

api.certaindata.ai

Mid-market reference rate for a base/quote currency pair, from the European Central Bank.

        api.certaindata.ai · q 65%
      

currency-converter.pdfextractapi.workers.dev

Convert an amount between currencies using live exchange rates.

        currency-converter.pdfextractapi.workers.dev · q 65%
      

fx.openverbs.com

Reference exchange rates for a base currency against some or all supported currencies (latest or a historical date).

        fx.openverbs.com · q 65%
      

Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/offercheck.offercheck.workers.dev.svg)](https://agenstry.com/agents/offercheck.offercheck.workers.dev)
[![Verified Business](https://agenstry.com/badge/offercheck.offercheck.workers.dev/identity.svg)](https://agenstry.com/agents/offercheck.offercheck.workers.dev)
[![Uptime](https://agenstry.com/badge/offercheck.offercheck.workers.dev/uptime.svg)](https://agenstry.com/agents/offercheck.offercheck.workers.dev)
[![A2A version](https://agenstry.com/badge/offercheck.offercheck.workers.dev/protocol.svg)](https://agenstry.com/agents/offercheck.offercheck.workers.dev)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "_source": "cdp_discovery",
  "resource_count": 5,
  "sample": "https://offercheck.offercheck.workers.dev/v1/fx"
}

Activity (audit trail)

Endpoints

Health · last 0 probes

Similar agents embedding-nearest

Embed your Agenstry badge

Audit-grade evidence bundle

Cookies on Agenstry