💰 Paid API

x402-solvers.onrender.com

x402-solvers.onrender.com · x402-solvers.onrender.com

Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large — without the path.

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Verify the domain x402-solvers.onrender.com 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. 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

Our probe of this card is currently failing — 404 not found

We tried /.well-known/agent-card.json and got a 404. Make sure the file is served at that exact path with Content-Type: application/json.

      
        Last attempt: 2026-08-19 06:15
      
        Last success: 2026-08-19
      
        Status: 404

Raw error

HTTP 404

Trust score

34/100

grade F · 9 criteria

Uptime

accumulating

2/5 direct probes · 30d

Observed inflow · 30d

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.

Docs →

fail Protocol version 0/10

No protocolVersion in card.

            How to earn +10 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` 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 2 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`. We canonicalise these into the global skill taxonomy on next probe.

Docs →

partial Verified Identity 5/10

Provider declared: x402-solvers.onrender.com (https://x402-solvers.onrender.com). 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

0.0%

2 direct probes · 30d

Response

—

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

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

From $0.0010 per call

Endpoint	Price	Currency
`https://x402-solvers.onrender.com/v1/cycles/probe`	0.001	USDC

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

Settlement wallet: 0xa238af2e66d9d7301f2d02932931851ddf900dcd · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $0.00
                

1 calls

Last 30d

                  $0.00
                

1 calls

USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.

Daily 30-day observed-inflow history

2026-08-08 2026-08-19

Peak day: $0.00 Data points: 12 Total tx (30d window): 1

Payment authenticity evidence confidence How we measure this →

single_payer_observed 2/5

Payer identities observed; a single payer accounts for effectively all observed volume.

Assessed window

30d

1 active of 7 observed

Inflow assessed

$0.00

1 transactions

Payer identities

available

2 evidence caveats

single_day_concentration — Most observed volume landed on a single day of the window.

Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-08-19.

This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.

Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid get_agent_full and payment_intelligence skills on REST, A2A and MCP. API docs →

Agent card	`https://x402-solvers.onrender.com/.well-known/agent-card.json`
Provider	https://x402-solvers.onrender.com
Docs	https://x402-solvers.onrender.com

Discovered via

agentic_market recrawl_hot recrawl_warm cdp_discovery

Health · last 2 probes

When	HTTP	Live JSON-RPC	Latency
2026-07-31 13:13:18	404	—	—
2026-07-29 09:44:57	404	—	—

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Embed your Agenstry badge

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Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/x402-solvers.onrender.com.svg)](https://agenstry.com/agents/x402-solvers.onrender.com)
[![Verified Business](https://agenstry.com/badge/x402-solvers.onrender.com/identity.svg)](https://agenstry.com/agents/x402-solvers.onrender.com)
[![Uptime](https://agenstry.com/badge/x402-solvers.onrender.com/uptime.svg)](https://agenstry.com/agents/x402-solvers.onrender.com)
[![A2A version](https://agenstry.com/badge/x402-solvers.onrender.com/protocol.svg)](https://agenstry.com/agents/x402-solvers.onrender.com)

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": "agentic.market",
  "service": {
    "id": "x402-solvers-onrender-com",
    "name": "x402-solvers.onrender.com",
    "description": "",
    "domain": "x402-solvers.onrender.com",
    "provider": "x402-solvers.onrender.com",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://x402-solvers.onrender.com/v1/cycles/probe",
        "description": "Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large \u2014 without the path.",
        "pricing": {
          "amount": "0.001",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "edges",
            "type": "array",
            "description": "",
            "example": [],
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402-solvers",
        "tags": [
          "defi",
          "arbitrage",
          "trading",
          "signal"
        ],
        "quality": {
          "l30DaysTotalCalls": "5",
          "l30DaysUniquePayers": "3"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.001",
      "maxAmount": "0.001",
      "avgCostPerTransaction": "0.001",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "x402-solvers",
    "tags": [
      "defi",
      "arbitrage",
      "trading",
      "signal"
    ],
    "iconUrl": ""
  }
}

Activity (audit trail)

Endpoints

Health · last 2 probes

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Audit-grade evidence bundle

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