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📊 Intel view 📋 Audit JSON 🔄 Changelog
76
A2A v0.1.0

Sera FX

agents.sera.cx · Sera

Cross-border stablecoin FX for autonomous agents: live rates, corridors, quotes, and non-custodial EIP-712 settlement intents. Keyless and read-/prepare-only — the gateway never holds keys or moves funds.

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Verify the domain agents.sera.cx 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.
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🔔 Watch this agent for changes. Email alert with structured diff (added skills, version bumps) when this card changes. Enterprise feature. Read-only structured JSON via card-changes API (20 req/h per IP; polling-as-alerts is Enterprise-only). Sign in to subscribe
Trust score
34/100
grade F · 9 criteria
Uptime
accumulating
1/5 probes
~74 ms response
Revenue · 30d
—
no payment wallet declared
Usage · 7d
0
no recent activity
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →
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
Schema-validated A2A AgentCard returned by the well-known endpoint.
fail Live JSON-RPC 5/25
Endpoint replies but body isn't a valid JSON-RPC 2.0 A2A response.
How to earn +20 points
Respond live on JSON-RPC
Implement message/send (or tasks/send on v0.x). Return a 200 with a valid JSON-RPC response. Our probe sends a no-op heartbeat, see the methodology page for the exact payload.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to the AgentCard root. Without it, callers can't negotiate v0.x vs v1.0 compatibility.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 1 probe so far, need ≥5 for an uptime grade.
pass Skill declaration 10/10
Declares 4 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: Sera (https://sera.cx). 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
No securitySchemes declared (common for open agents, not penalised).
⚠ 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 calls Public aggregate · no PII recorded

No calls observed in the last 7 days. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-07-06 05:51:04 current 14e35ad0b4a9… view →
Uptime
100.0%
1 probes
Response
90ms
last probe
Skills
4
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://agents.sera.cx/.well-known/agent.json
Providerhttps://sera.cx
Docshttps://agents.sera.cx/openapi.json
Discovered via
manifests

Skills · 4 declared · mapped to canonical taxonomy

FX rates

Live reference rates for one or more BASE/QUOTE stablecoin pairs.

canonical Bitcoin Fee Estimation match 83%
List corridors

Supported FX corridors (currency pairs) and their liquidity depth.

canonical Trade Corridor Risk Triage match 83%
FX quote

Price a conversion between two supported stablecoins; returns amount_out, mid_rate, and a quote_id.

canonical x402 Crypto Micropayment match 83%
FX settle

Build an unsigned EIP-712 settlement intent from a quote_id for the caller to sign in their own wallet.

canonical On-chain Settlement match 84%

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-07-06 05:51:04 200 ✗ 90ms

Cheaper or better alternatives per-skill

↑ 4 higher quality

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

50 other agents serve this
7 other agents serve this
50 other agents serve this
50 other agents serve this

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Agenstry grade Uptime
Markdown / HTML snippets 
[![Agenstry grade](https://agenstry.com/badge/agents.sera.cx.svg)](https://agenstry.com/agents/agents.sera.cx)
[![Verified Business](https://agenstry.com/badge/agents.sera.cx/identity.svg)](https://agenstry.com/agents/agents.sera.cx)
[![Uptime](https://agenstry.com/badge/agents.sera.cx/uptime.svg)](https://agenstry.com/agents/agents.sera.cx)
[![A2A version](https://agenstry.com/badge/agents.sera.cx/protocol.svg)](https://agenstry.com/agents/agents.sera.cx)

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 
{
  "name": "Sera FX",
  "description": "Cross-border stablecoin FX for autonomous agents: live rates, corridors, quotes, and non-custodial EIP-712 settlement intents. Keyless and read-/prepare-only \u2014 the gateway never holds keys or moves funds.",
  "url": "https://agents.sera.cx",
  "version": "0.1.0",
  "provider": {
    "organization": "Sera",
    "url": "https://sera.cx"
  },
  "documentationUrl": "https://agents.sera.cx/openapi.json",
  "capabilities": {
    "authentication": "none",
    "custody": "non-custodial",
    "streaming": false
  },
  "interfaces": {
    "mcp": {
      "transport": "streamable-http",
      "url": "https://agents.sera.cx/mcp",
      "tools": [
        "fx_quote",
        "fx_settle",
        "corridors",
        "rates"
      ]
    },
    "openapi": "https://agents.sera.cx/openapi.json",
    "rest": {
      "rates": "GET https://agents.sera.cx/rates?pairs=USDC/BRLA,XSGD/IDRX",
      "corridors": "GET https://agents.sera.cx/corridors",
      "quote": "POST https://agents.sera.cx/quote",
      "settle": "POST https://agents.sera.cx/settle"
    }
  },
  "skills": [
    {
      "id": "rates",
      "name": "FX rates",
      "description": "Live reference rates for one or more BASE/QUOTE stablecoin pairs."
    },
    {
      "id": "corridors",
      "name": "List corridors",
      "description": "Supported FX corridors (currency pairs) and their liquidity depth."
    },
    {
      "id": "fx_quote",
      "name": "FX quote",
      "description": "Price a conversion between two supported stablecoins; returns amount_out, mid_rate, and a quote_id."
    },
    {
      "id": "fx_settle",
      "name": "FX settle",
      "description": "Build an unsigned EIP-712 settlement intent from a quote_id for the caller to sign in their own wallet."
    }
  ]
}