WorksCode and developmentBlockchain

SALT19 Agent Utility Grid

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

Addresshttps://api.salt19.com/mcp

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

For Cursor and other clients

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

Test: Works: Handshake succeeded
Tools: 33 tools
Handshake: 877 ms
Transport: streamable-http · 2025-06-18
Tested: 6 November 2026
Registry name: io.github.GabrielAllit1/salt19-agent-utility-grid v0.5.1
Listed: 13 September 2026
Updated: 13 September 2026
Website: salt19.com/agent-utility-grid/

The last 1 tests

When	Result	Time
2026-11-06 12:26 UTC	Handshake succeeded	877 ms

The 33 tools it listed

"Read only" and "Changes data" are the server's own marks. Underlined parameters are required.

agent-claim-output-verifier
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.
claim evidence context required_standard _salt19_operation_id _x402_payment_signature _salt19_handoff_id
agent-code-change-risk-gate
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.
diff constraints context _salt19_operation_id _x402_payment_signature _salt19_handoff_id
agent-decision-preflight
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.
decision_type target constraints _salt19_operation_id _x402_payment_signature _salt19_handoff_id
agent-plan-verifier
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.
goal plan constraints _salt19_operation_id _x402_payment_signature _salt19_handoff_id
base-contract-state
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.
address _salt19_operation_id _x402_payment_signature _salt19_handoff_id
base-token-allowance
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.
token_address owner spender _salt19_operation_id _x402_payment_signature _salt19_handoff_id
base-token-balance
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.
token_address owner _salt19_operation_id _x402_payment_signature _salt19_handoff_id
base-transaction-status
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.
transaction_hash _salt19_operation_id _x402_payment_signature _salt19_handoff_id
base-wallet-balance
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.
address _salt19_operation_id _x402_payment_signature _salt19_handoff_id
commerce-decision
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.
request payment_required policy _salt19_operation_id _x402_payment_signature _salt19_handoff_id
commerce-receipt
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.
request payment_required payment_payload settlement policy delivery expected_delivery target_salt19_operation_id _salt19_operation_id _x402_payment_signature _salt19_handoff_id
commerce-verify
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.
request payment_required payment_payload settlement policy delivery expected_delivery target_salt19_operation_id _salt19_operation_id _x402_payment_signature _salt19_handoff_id
dependency-go-no-go
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.
package version _salt19_operation_id _x402_payment_signature _salt19_handoff_id
dependency-upgrade-go-no-go
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.
package current_version target_version runtime framework constraints _salt19_operation_id _x402_payment_signature _salt19_handoff_id
find-salt19-toolRead only
Find the Best 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.
need max_price_usd prefer_fresh_state
github-repo-facts
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.
repo _salt19_operation_id _x402_payment_signature _salt19_handoff_id
github-repo-preflight
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.
repo _salt19_operation_id _x402_payment_signature _salt19_handoff_id
model-memory-fit
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.
parameter_count_b quantization_bits vram_gb runtime_overhead_ratio _salt19_operation_id _x402_payment_signature _salt19_handoff_id
npm-package-facts
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.
package version _salt19_operation_id _x402_payment_signature _salt19_handoff_id
npm-package-intel
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.
package version _salt19_operation_id _x402_payment_signature _salt19_handoff_id
nws-active-alerts
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.
area limit _salt19_operation_id _x402_payment_signature _salt19_handoff_id
repo-adoption-go-no-go
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.
repo _salt19_operation_id _x402_payment_signature _salt19_handoff_id
report-payment-capability
Report x402 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.
product supports_x402 supported_networks supported_assets wallet_available autonomous_spend_allowed max_purchase_usd decline_reason session_id
report-x402-authorization-progress
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.
handoff_id stage signer_available signer_kind sdk error_code client_timestamp
salt19-pricingRead only
SALT19 Live 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.
max_price_usd tier
sec-company-facts
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.
cik concepts _salt19_operation_id _x402_payment_signature _salt19_handoff_id
sec-recent-filings
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.
cik limit _salt19_operation_id _x402_payment_signature _salt19_handoff_id
url-http-preflight
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 _salt19_operation_id _x402_payment_signature _salt19_handoff_id
url-to-llm-markdown
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.
url max_chars _salt19_operation_id _x402_payment_signature _salt19_handoff_id
usgs-earthquakes
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.
hours min_magnitude limit _salt19_operation_id _x402_payment_signature _salt19_handoff_id
verify-decision-receiptRead only
Verify SALT19 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.
id
x402-authorization-handoffRead only
SALT19 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.
product arguments operation_id session_id
x402-payment-preflightRead only
SALT19 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.
product supported_networks supported_assets wallet_address max_price_usd supports_x402 autonomous_spend_allowed

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