AgentResolver Guard MCP Server

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AgentResolver Guard is listed as active in the registry but did not answer our last check. It exposes 33 tools. Last commit 18 Sep 2026.

AgentResolver Guard: $0.001 USDC x402 verify-before-pay Guard with free capability resolution.

Uptime history 5 days of history · worst day 25%

5 days agonow

31.9%

Uptime 24h

29 of 91 checks

Tools

read from the server

675 ms

Response time

average over 24h

Stars

last commit 18 Sep 2026

What changed 81

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 15 September 2026. No other catalogue keeps this.

18 Sep 2 tools appeared payment_guard, provider_launch_check

17 Sep 2 tool descriptions were rewritten http_inspect, x402_ping

17 Sep a tool appeared x402_payment_preflight

16 Sep 28 tool descriptions were rewritten35 times that day abi_decode, abi_encode, agent_readiness and 25 more

16 Sep 25 tools appeared abi_decode, abi_encode, base64_decode and 22 more

16 Sep a tool changed the parameters it asks for verified_resolve

15 Sep a tool description was rewritten5 times that day resolve

15 Sep 4 tools appeared agent_readiness, batch_verified_resolve, mcp_preflight and 1 more

15 Sep a tool changed the parameters it asks for3 times that day resolve

15 Sep a tool changed version2 times that day

and 15 more, back to 15 September 2026

AgentResolver Guard does not always answer

Over the last week it answered 55.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add agentresolver --transport http https://agentresolver.vercel.app/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "agentresolver": {
      "url": "https://agentresolver.vercel.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.agentresolver]
url = "https://agentresolver.vercel.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "agentresolver": {
      "url": "https://agentresolver.vercel.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "agentresolver": {
      "url": "https://agentresolver.vercel.app/mcp"
    }
  }
}

Available tools 33

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

abi

abi_decode

Paid $0.005 USDC on Base or Solana exact Ethereum ABI decoding into JSON-safe typed values.

abi_encode

Paid $0.005 USDC on Base or Solana exact Ethereum ABI encoding from Solidity typed JSON values to calldata-ready hex.

base64

base64_decode

Paid $0.001 USDC on Base or Solana Base64 to UTF-8 decoding.

base64_encode

Paid $0.001 USDC on Base or Solana UTF-8 to Base64 encoding.

evm

evm_address_checksum

Paid $0.003 USDC on Base or Solana exact EIP-55 address validation and checksum normalization.

evm_units

Paid $0.005 USDC on Base or Solana exact decimal/base-unit conversion with arbitrary token decimals.

json

json_normalize

Paid $0.001 USDC on Base or Solana canonical JSON normalization plus SHA-256 digest.

json_schema_validate

Paid $0.001 USDC on Base or Solana deterministic JSON Schema subset validation.

x402

x402_payment_preflight

Paid $0.001 USDC on Base or Solana transaction-path gate for autonomous buyers. Returns eligible/blocked, exact target payment terms, fail-closed reason codes and verifiable evidence before caller authorization. AgentResolver never requests a private key, signs the target payment, or custodies/forwards target funds.

x402_ping

Paid $0.001 USDC on Base or Solana no-body settlement canary for funded agents. Returns a timestamped pong only after successful x402 payment to verify wallet, facilitator, payment, and delivery end-to-end.

agent

agent_readiness

Paid $0.005 USDC on Base or Solana audit of a public website for agent discoverability and machine-readable integration signals. x402-aware MCP clients can authorize and settle inside this tool call.

batch

batch_verified_resolve

Paid $0.05 USDC on Base or Solana batch live verification for 2–4 capability decisions using unpaid MCP and x402/HTTP evidence. x402-aware MCP clients can authorize and settle inside this tool call.

eip712

eip712_hash

Paid $0.005 USDC on Base or Solana exact EIP-712 typed-data digest for signing and verification workflows.

ens

ens_namehash

Paid $0.01 USDC on Base or Solana ENSIP-15 normalization, exact ENS namehash and label hashes.

hash

hash_encode

Paid $0.001 USDC on Base or Solana deterministic SHA-256, SHA-512, HMAC-SHA256, Base64 encode/decode, or non-verifying JWT decode. x402-aware MCP clients can authorize and settle inside this tool call.

hmac

hmac_sha256

Paid $0.001 USDC on Base or Solana HMAC-SHA256 hex digest.

http

http_inspect

Paid $0.001 USDC on Base or Solana verify-before-pay endpoint safety check: payTo verification, quote price, network, asset, resource binding and x402 challenge compliance before an agent authorizes spend. POST probes require explicit caller opt-in because an unprotected endpoint could have side effects.

jwt

jwt_decode

Paid $0.001 USDC on Base or Solana non-verifying JWT header/payload decode.

keccak256

keccak256

Paid $0.004 USDC on Base or Solana exact Ethereum keccak256 digest for UTF-8 text or hex bytes.

mcp

mcp_preflight

Paid $0.001 USDC on Base or Solana live MCP endpoint preflight for reachability, compatibility, latency, server metadata and tool inventory. x402-aware MCP clients can authorize and settle inside this tool call.

openapi

openapi_select

Paid $0.005 USDC on Base or Solana selection of the best operation from one public JSON OpenAPI spec for a stated goal. Returns a compact execution-ready contract. x402-aware MCP clients can authorize and settle inside this tool call.

payment

payment_guard

Paid $0.001 USDC fail-closed payment authorization preflight. Use immediately before an autonomous agent signs a target x402 payment. Returns eligible/blocked, exact observed payment terms, reason codes, evidence receipt and stable fingerprints. The caller retains sole spending authority.

provider

provider_launch_check

Paid $0.05 USDC seller-side readiness and x402 contract verification before AgentResolver provider-network review.

resolve

resolve

Free default discovery. Find ranked tools, APIs, MCP servers and machine services, with a prefilled paid live-evidence action when useful.

sha256

sha256

Paid $0.001 USDC on Base or Solana SHA-256 digest of bounded UTF-8 text.

sha512

sha512

Paid $0.001 USDC on Base or Solana SHA-512 digest of bounded UTF-8 text.

slugify

slugify

Paid $0.001 USDC on Base or Solana deterministic slug generation.

solidity

solidity_selector

Paid $0.01 USDC on Base or Solana exact 4-byte Solidity selector and full keccak256 signature hash.

sponsorship

sponsorship_info

Free read-only information for tool/API/MCP providers about AgentResolver's explicitly labeled sponsorship pilot. Organic ranking remains independent; applying creates no purchase or financial commitment.

tool

tool_contract

Paid $0.005 USDC on Base or Solana deterministic JSON-schema compatibility check between one tool output and the next tool input. Returns exact incompatibility reasons and conservative normalized mappings. x402-aware MCP clients can authorize and settle inside this tool call.

url

url_parse

Paid $0.001 USDC on Base or Solana absolute URL parser.

uuid

uuid_v4

Paid $0.001 USDC on Base or Solana UUID v4 generation, up to 20 IDs.

verified

verified_resolve

Paid $0.02 USDC on Base or Solana capability resolution plus up to two unpaid live verification probes across top MCP and x402/HTTP marketplace candidates. x402-aware MCP clients can authorize and settle inside this tool call.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

list_capabilities

removed 15 Sep 2026

Endpoints

URL	Transport	State	Latency	Checked
https://agentresolver.vercel.app/mcp	streamable-http	answering	50 ms	11 min ago

Alternatives to AgentResolver Guard

same job, measured the same way

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26 tools answering

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Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.

4 tools answering

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Fail-closed verify-before-you-act gate for AI agents. Signed receipts. Pay-per-call via x402.

74 installs/wk local only

Utilsforagents MCP

by utilsforagents

Pay-per-call AI agent utilities via x402 on Base (USDC). 7 tools, $0.003/call.

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by x402git

Buy private git repos and agent skills with USDC over x402. Read the manifest free, then pay.

6 tools answering

AgentResolver Guard — questions

Answers built from our own checks of this server.

What can AgentResolver Guard do?

It exposes 33 tools, read directly from the server on our last check. Among them: abi_decode, abi_encode, agent_readiness, base64_decode, base64_encode, batch_verified_resolve and 27 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is AgentResolver Guard mostly used for?

Its tools cluster around evm, x402 and base64. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is AgentResolver Guard working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 29 of 91 checks got a reply (31.9%), average response time 675 ms. The bar chart above shows every period we have measured.

Did AgentResolver Guard ever remove tools?

Yes. list_capabilities is no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.

The registry lists AgentResolver Guard as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect AgentResolver Guard?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does AgentResolver Guard need an API key?

No. AgentResolver Guard completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 33 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is AgentResolver Guard?

It answers our handshake in 675 ms on average, which is faster than 18% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is AgentResolver Guard open source?

Yes — it is published under the MIT licence, written in TypeScript, 0 stars on GitHub and 3 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.