SALT19 Agent Utility Grid MCP Server

by gabrielallit1 Your server? Claim it

answering

SALT19 Agent Utility Grid is answering right now. Last checked 7 min ago. It exposes 33 tools.

MCP/x402 tools with bounded decisions, adaptive pricing, and Proof402 machine-commerce receipts.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 54 days of history · worst day 95%

54 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

146 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 80

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 26 August 2026. No other catalogue keeps this.

15 Sep 12 tool descriptions were rewritten agent-claim-output-verifier, agent-code-change-risk-gate, agent-decision-preflight and 9 more

13 Sep 9 tool descriptions were rewritten22 times that day agent-claim-output-verifier, agent-code-change-risk-gate, agent-decision-preflight and 6 more

13 Sep a tool changed version

12 Sep 5 tool descriptions were rewritten agent-claim-output-verifier, agent-decision-preflight, agent-plan-verifier and 2 more

11 Sep 6 tool descriptions were rewritten agent-claim-output-verifier, agent-code-change-risk-gate, dependency-go-no-go and 3 more

10 Sep a tool description was rewritten agent-plan-verifier

8 Sep a tool description was rewritten agent-decision-preflight

7 Sep 2 tool descriptions were rewritten agent-claim-output-verifier, dependency-go-no-go

6 Sep 2 tool descriptions were rewritten npm-package-intel, url-http-preflight

5 Sep 2 tool descriptions were rewritten agent-claim-output-verifier, npm-package-intel

and 39 more, back to 26 August 2026

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add salt19-agent-utility-grid --transport http https://api.salt19.com/mcp

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

{
  "mcpServers": {
    "salt19-agent-utility-grid": {
      "url": "https://api.salt19.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.salt19-agent-utility-grid]
url = "https://api.salt19.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "salt19-agent-utility-grid": {
      "url": "https://api.salt19.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "salt19-agent-utility-grid": {
      "url": "https://api.salt19.com/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.

base

base-contract-state

Inspect whether a Base address currently has deployed bytecode and return code size plus best-effort ERC-20 metadata. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

base-token-allowance

Read a live ERC-20 allowance on Base for an owner/spender pair without an API key. Returns the current block and raw token units. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

base-token-balance

Read a live ERC-20 token balance on Base and return raw units plus best-effort token decimals/symbol metadata without signup or an API key. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

base-transaction-status

Check current Base transaction receipt state and return PENDING, CONFIRMED_SUCCESS, or CONFIRMED_REVERTED with block and gas evidence. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

base-wallet-balance

Read a wallet's live native ETH balance on Base at the latest block without an API key. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

agent

agent-claim-output-verifier

Map an autonomous agent claim or output to supplied evidence and return SUPPORTED, PARTIALLY_SUPPORTED, NOT_PROVEN, or CONTRADICTED with explicit unsupported elements, contradictions, missing evidence, and recommended verification. Price: $0.50 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once.

agent-code-change-risk-gate

Static pre-merge risk gate for autonomous code changes: inspect a supplied unified diff for security-sensitive surfaces, destructive operations, architecture/constraint conflicts, test requirements, rollback risk, and bounded breaking-change risk before an agent merges or deploys. Price: $1.25 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

agent-decision-preflight

Before an autonomous coding agent installs or adopts software, return a bounded GO, WARN, or BLOCK decision with evidence and a portable SALT19 verification receipt. Price: $0.50 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

agent-plan-verifier

Verify an autonomous agent plan before execution for missing preconditions, destructive steps, unsafe ordering, goal misalignment, constraint violations, and repair actions, returning a bounded GO/WARN/BLOCK result. Price: $0.75 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

commerce

commerce-decision

Before an autonomous agent pays an x402 challenge, bind the request, accepted payment offer, and machine spending policy into a deterministic GO/WARN/BLOCK decision with SHA-256 commitments. Price: $0.02 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

commerce-receipt

Verify an x402 commercial state and persist a signed Ed25519 Proof402 receipt whose Commerce State Root commits request, offer, policy, payment, settlement, and delivery evidence; receipts are later Merkle-batched for public inclusion proofs. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

commerce-verify

Verify that an x402 v2 payment payload, settlement evidence, original request, accepted offer, spending policy, and delivered response are mutually bound; SALT19 operations can additionally be checked against authoritative D1 commercial state. Price: $0.03 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

dependency

dependency-go-no-go

Dependency approval decision for coding agents: decide whether an npm dependency or package is safe to install or adopt and return GO, WARN, or BLOCK using vulnerabilities, security, license, maintenance, deprecation, and package metadata. Price: $0.25 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

dependency-upgrade-go-no-go

Compare current and target npm versions and return GO/WARN/BLOCK plus UPGRADE/DEFER/BLOCK guidance, bounded semver risk, OSV security implications, recommended tests, and explicit NOT_PROVEN runtime, peer, migration, and ecosystem compatibility boundaries. Price: $0.20 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once.

github

github-repo-facts

Return current public GitHub repository facts such as archive state, license, stars, forks, branch and latest push without the premium adoption decision. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

github-repo-preflight

GitHub repository due diligence for coding agents: evaluate whether a public or open-source repository is safe and maintained enough to adopt using license, maintenance, release freshness, activity, project health, and risk signals. Price: $0.10 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

npm

npm-package-facts

Return live npm registry facts for the latest or requested package version without the higher-priced vulnerability and adoption decision layer. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

npm-package-intel

Check whether an npm package is deprecated or vulnerable before installing it, including vulnerabilities, license, maintenance, freshness, dependency health, and package.json risk signals. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

report

report-payment-capability

Free cooperative telemetry tool for reporting whether a client can use x402/Base/USDC or why it declined. Never submit private keys, payment signatures, or secret wallet material.

report-x402-authorization-progress

Free cooperative telemetry for the local buyer authorization path. Report stage metadata only; never include private keys, seed phrases, raw signatures, or PAYMENT-SIGNATURE values.

salt19

find-salt19-tool

FREE START-HERE ROUTER. Describe the fresh external fact, live state, developer intelligence, or bounded decision you need. Returns the best current SALT19 tool, live price, schema, alternatives, and exact x402 preflight next step. No payment is required for routing.

salt19-pricing

FREE catalog/pricing surface. Returns current discoverable SALT19 products, live x402 prices, schemas, and Fresh-State acquisition roles so an agent can budget before choosing a paid call.

sec

sec-company-facts

Return selected latest SEC XBRL company facts from EDGAR's live companyfacts feed with source dates and units. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

sec-recent-filings

Return recent SEC EDGAR filings for a company CIK from the live SEC submissions feed, normalized for agent consumption. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

url

url-http-preflight

Inspect a URL before an autonomous agent calls it, and preflight or verify a website or external API endpoint is healthy and safe to call by checking HTTP status, redirects, latency, and security headers. Price: $0.03 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

url-to-llm-markdown

Fetch a public web page, remove scripts/styles/navigation noise, and return bounded LLM-friendly Markdown plus canonical URL and fetch provenance. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

x402

x402-authorization-handoff

Free handoff tool that generates a live PAYMENT-REQUIRED challenge for a concrete paid request, returns exact REST and MCP retry templates, and creates a correlation ID. It never signs or moves buyer funds.

x402-payment-preflight

Free buyer-side compatibility preflight. Returns the live SALT19 price, Base/USDC requirement, optional public wallet-balance sufficiency, and the exact next action without signing or moving funds.

model

model-memory-fit

Can this AI model run on my graphics card? Estimate model memory requirements and check whether a quantized LLM fits available GPU VRAM before loading or local inference. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

nws

nws-active-alerts

Return current U.S. National Weather Service active alerts for a state or territory as compact structured JSON. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

repo

repo-adoption-go-no-go

Repository adoption decision for autonomous coding agents using public GitHub maintenance, archive, license, and repository-health evidence, with explicit UNKNOWN and NOT_PROVEN boundaries for dependency, security, compatibility, integration, and project-fit claims. Price: $0.35 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

usgs

usgs-earthquakes

Query recent USGS earthquake events by lookback window and minimum magnitude and return compact live event state. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

verify

verify-decision-receipt

Free integrity lookup for a SALT19 decision receipt. verified=true proves the stored evidence still matches its recorded digest; it does not prove the underlying software is safe. _salt19_operation_id is recommended but optional for standard x402 compatibility.

Endpoints

URL	Transport	State	Latency	Checked
https://api.salt19.com/mcp	streamable-http	answering	90 ms	7 min ago

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SALT19 Agent Utility Grid — questions

Answers built from our own checks of this server.

What can SALT19 Agent Utility Grid do?

It exposes 33 tools, read directly from the server on our last check. Among them: agent-claim-output-verifier, agent-code-change-risk-gate, agent-decision-preflight, agent-plan-verifier, base-contract-state, base-token-allowance 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 SALT19 Agent Utility Grid mostly used for?

Its tools cluster around base, agent and commerce. 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 SALT19 Agent Utility Grid working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 146 ms. The bar chart above shows every period we have measured.

Is SALT19 Agent Utility Grid still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect SALT19 Agent Utility Grid?

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 SALT19 Agent Utility Grid need an API key?

No. SALT19 Agent Utility Grid 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 SALT19 Agent Utility Grid?

It answers our handshake in 146 ms on average, which is faster than 75% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.