grug402 bronze

grug402.dev

🇺🇸 US · Google LLC Checked 3d ago tools

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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 12 Nov 2026.

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 (1)

grug402.dev.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 12 Nov 2026. What this means
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 7 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 — “x402 Marketplace” 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: 5 Nov 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: MCP verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Google LLC (AS396982)
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 grug402.dev controls every word below.

This card declares no skills. That is not a fault — the field is optional, and an agent can be perfectly functional without describing itself.

What kind of listing

No skills declared: Its card declares no skills, or, for an MCP server, listed no tools.

Checked by agenttru.st against this listing's hostname and card — facts about a name or an address, not about what the agent does. How kinds are decided.

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.

x402 Scenario Catalog API (default network)

api

JSON REST API returning all 103 x402 payment scenarios (24 fully-compliant, 79 intentional protocol quirks) on the default network, Radius eip155:72344 testnet (chain 72344). Each entry carries the HTTP method, full URL, price in SBC, payment network, facilitator, and a markdown documentation link. The response also carries a `chains` array describing every payable network, each with its own catalog document at the same path under that network's route prefix. Payable networks: Radius Testnet (eip155:72344,

https://grug402.dev/api/x402/catalog

x402 Scenario Catalog API (Radius Mainnet)

api

The same 103 x402 payment scenarios, addressed and priced for Radius Mainnet (eip155:723487, chain 723487). Endpoints are served at https://grug402.dev/api/x402-mainnet/<scenario-id> — identical scenario ids to every other network. Asset: USDC (6 decimals) at 0x7bAB65D9D76df37117F56128F72103A78Bfa4B52, which settles Permit2, and can also settle EIP-3009. WARNING: this network settles REAL funds — a payment here spends value no faucet can re-mint. It is opt-in; the default network does not move real valu

https://grug402.dev/api/x402-mainnet/catalog

x402 Scenario Catalog API (Base Sepolia)

api

The same 103 x402 payment scenarios, addressed and priced for Base Sepolia (eip155:84532, chain 84532). Endpoints are served at https://grug402.dev/api/x402-base-sepolia/<scenario-id> — identical scenario ids to every other network. Asset: USDC (6 decimals) at 0x036CbD53842c5426634e7929541eC2318f3dCF7e, which settles EIP-3009.

https://grug402.dev/api/x402-base-sepolia/catalog

grug402 MCP Server

mcp

Stateless Streamable HTTP MCP server (no API key required) exposing the grug402 x402 catalog as agent tools. Transport endpoint: https://grug402.dev/api/mcp. Tools: list_chains (every payable network with its URL prefix and whether it moves real funds), list_scenarios (browse all scenarios with optional filters), get_scenario (full detail + radius-cli command), call_scenario (fetch a scenario's unpaid 402 challenge and return it decoded), list_bug_classes (taxonomy of protocol-deviation types), list_categor

https://grug402.dev/.well-known/mcp/server-card.json

x402 Payments Agent Skill

skill

Agent Skills Discovery index (RFC v0.2.0) listing the x402-payments SKILL.md — a structured skill document that teaches an agent the complete x402 payment loop: protocol flow (402 challenge → sign → retry → settle), supported payment clients (radius-cli, viem script), how to select a network and which networks move real funds, per-network asset details, and a linked index of every scenario.

https://grug402.dev/.well-known/agent-skills/index.json

x402 Marketplace OpenAPI 3.1 Document

api-description

Enriched OpenAPI 3.1 document describing all 103 x402 endpoints grouped by protocol category — real paths, methods, request bodies, 402-challenge schema, and per-scenario tags. Importable into Kong/decK, Postman, Insomnia, and any OpenAPI-compatible tool.

https://grug402.dev/openapi.yaml

And 1 more entry 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.

Protocol: mcp
Version: 1.0.0

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Capabilities: tools
Agent card: https://grug402.dev/api/mcp

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