PayStage

io.github.base-buzz/mcpVersion 0.3.5

Umbrella MCP: payment preflight, auth watch, HIP-3 trade preflight, velocity checks

Status

Responds285 msNov 14, 2026, 14:46 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:46 UTC
Latency: 285 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://api.paystage.xyz/mcpResponds285 msNov 14, 2026, 14:46 UTC

No sign-in

Claude Code

claude mcp add --transport http base-buzz https://api.paystage.xyz/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: base-buzz
Remote MCP server URL: https://api.paystage.xyz/mcp

Cursor

{
  "mcpServers": {
    "base-buzz": {
      "url": "https://api.paystage.xyz/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"base-buzz","type":"http","url":"https://api.paystage.xyz/mcp"}'

Streamable HTTP

npm: @paystage/mcp 0.3.5

Package only

npm (npx)

claude mcp add base-buzz -- npx -y @paystage/mcp@0.3.5

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Tools

9 tools

Tools of PayStage
	Description		Read-only	Idempotent	Open world
`decode_payment_required`Decode a base64 `payment-required` header from a 402 response into the JSON challenge, so an agent can inspect it before deciding anything.	Decode a base64 `payment-required` header from a 402 response into the JSON challenge, so an agent can inspect it before deciding anything.	No	Yes	Not declared	No
`evaluate_batch`Evaluate several payment challenges against one policy in a single call. Returns one verdict per input, in order, so an agent settling a batch decides once per payment and can stop at the first refusal.	Evaluate several payment challenges against one policy in a single call. Returns one verdict per input, in order, so an agent settling a batch decides once per payment and can stop at the first refusal.	No	Yes	Not declared	No
`evaluate_hip3_trade`Evaluate a Hyperliquid HIP-3 (trade.xyz) order against a TradePolicy before an agent trades. Returns decision allow \| review \| do_not_trade.	Evaluate a Hyperliquid HIP-3 (trade.xyz) order against a TradePolicy before an agent trades. Returns decision allow \| review \| do_not_trade.	No	Yes	Not declared	Yes
`evaluate_mcp_payment`Evaluate an x402 PaymentRequired payload against a PayStage spending policy before paying	Evaluate an x402 PaymentRequired payload against a PayStage spending policy before paying	No	Yes	Not declared	No
`evaluate_outstanding_auths`List and evaluate outstanding token authorizations against a policy	List and evaluate outstanding token authorizations against a policy	No	Yes	Not declared	Yes
`evaluate_velocity`Rolling-window rate and spend-pattern check for a proposed payment against recent action history and a policy.velocity config	Rolling-window rate and spend-pattern check for a proposed payment against recent action history and a policy.velocity config	No	Yes	Not declared	No
`list_outstanding_auths`List outstanding token authorizations for a wallet	List outstanding token authorizations for a wallet	No	Yes	Not declared	Yes
`validate_policy`Check a policy document without evaluating a payment. Returns the exact validation error when it is wrong, which is the question behind most support requests.	Check a policy document without evaluating a payment. Returns the exact validation error when it is wrong, which is the question behind most support requests.	No	Yes	Not declared	No
`verify_receipt`Verify a PayStage receipt against the published signing key. Returns the verdict it attests to, or why it cannot be trusted.	Verify a PayStage receipt against the published signing key. Returns the verdict it attests to, or why it cannot be trusted.	No	Yes	Not declared	Yes

Details

Registry status: Active
Published: Nov 12, 2026
Updated: Nov 12, 2026
Website: https://paystage.xyz/⁠ (opens in a new tab)
Repository: https://github.com/base-buzz/paystage⁠ (opens in a new tab)
Categories (suggested): Invoicing and accounting Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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