Model Context Protocol (MCP) server for freee API integration
Nothing to run from here
Backend is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
6
tools declared
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trust score
remote
at its publisher
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calls last 7d
What it does
Deterministic pre-trade risk checks for AI agents on Robinhood Chain. Returns allow/warn/deny.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user --transport http backend-mcp https://api.collarguardrail.com/mcp-http/mcp
# 2 — ask your agent for something these tools do
# evaluate_trade, evaluate_trade_paid, check_token_safety and 3 more
Backend costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
AIAll 1 server
aiguardrail1 server
1 category
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine and nothing runs on ours: this server answers at its publisher’s own address, and what you install is the connection straight to it.
Claude Codedeclared by this listing
This is a public server: it answers at its publisher’s own address and this marketplace is not in the path. Claude Code registers it in one command; --scope user makes it available in every project. The transport below is http, as the publisher's own manifest declares it.
claude mcp add --scope user --transport http backend-mcp https://api.collarguardrail.com/mcp-http/mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it answers at its publisher’s own address: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it writes
One config entry pointing straight at the publisher’s own address — this marketplace is not in the path, and nothing from this listing executes on your machine.
What you approve
6 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
Pre-trade risk check for a proposed trade. Call this BEFORE executing any trade and treat a "deny" decision as a hard stop. Evaluated at a fixed Tier 1 ceiling ($5,000 notional). For higher limits, use evaluate_trade_paid (Tier 2, $25,000) which settles an x402 payment on-chain.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| wallet | string | yes | EVM wallet address (0x...) the trade would execute from. |
| asset | string | yes | Asset symbol, e.g. NVDA, AAPL, TSLA, USDG. |
| contract_address | string | yes | Token contract address (0x...). Must match the official registry address for that symbol, or the trade is denied as a suspected fake token. |
| side | string | yes | "buy" or "sell". |
| amount | number | yes | Quantity in token units — NOT a pre-computed USD value. |
| max_slippage_bps | integer | no | Max slippage in basis points (default 100). |
| request_id | no | Optional idempotency key. |
Pre-trade risk check gated by an x402 payment. Evaluated as COLR Tier 2: $25,000 notional ceiling, 10/25 per-minute rate limits. No COLR holdings are required — the on-chain payment is the credential. FLOW ---- 1. Call WITHOUT payment_proof → the tool returns a PaymentRequiredOutput describing the on-chain payment (network, asset, amount, payTo, resource). 2. Settle the payment on-chain u
| Parameter | Type | Required | Notes |
|---|---|---|---|
| wallet | string | yes | EVM wallet address (0x...) the trade would execute from. |
| asset | string | yes | Asset symbol, e.g. NVDA, AAPL, TSLA, USDG. |
| contract_address | string | yes | Token contract address (0x...). |
| side | string | yes | "buy" or "sell". |
| amount | number | yes | Quantity in token units. |
| max_slippage_bps | integer | no | Max slippage in basis points (default 100). |
| request_id | no | Optional idempotency key. | |
| payment_proof | no | x402 payment proof from the facilitator. Omit on the first call to receive the payment challenge. |
Honeypot / contract safety check for any ERC-20 token. Returns a severity classification (safe / warn / danger), the specific risk factors detected, and the result of a simulated sell. When severity=danger, the next evaluate_trade for the same contract is automatically denied regardless of any other checks. This is a heuristic bytecode + simulation check, not a formal audit. Use it before trad
| Parameter | Type | Required | Notes |
|---|---|---|---|
| contract_address | string | yes | Token contract address (0x...). |
Simulate a wallet's ERC-20 balance after a hypothetical trade using eth_call state override. Read-only: no transaction is ever sent.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| token_address | string | yes | ERC-20 contract address (0x...). |
| holder | string | yes | Wallet address whose balance is simulated (0x...). |
| delta | number | yes | Signed amount (negative = spend). |
| decimals | integer | no | Token decimals (default 18). |
List every asset in the guardrail's official Robinhood Chain registry, with its canonical contract address.
No parameter schema on file.
Verify the tamper-evident audit trail for a wallet's past guardrail decisions.
| Parameter | Type | Required | Notes |
|---|---|---|---|
| wallet | string | yes | EVM wallet address (0x...). |
| limit | integer | no | How many recent records to verify (1-1000, default 100). |
Free
$0 forever
- Every tool — any call limit is its publisher’s, not ours
- No card, and mcprush charges nothing for it
- Runs at its publisher’s own address — this marketplace is not in the path
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Backend or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
—
—
Alert at 80% · then the tool returns a normal MCP error
Used this month: —
—Grade not published
No rule-by-rule report on file for this release
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
This listing is an address its publisher runs, and you connect to it directly — this marketplace is not in the path. The scanner reads packages and public source, and an address is neither. So there is no grade — not a withheld one, an unmeasured one.
Release history
This is an address its publisher runs: which release it serves is theirs to choose, so there is nothing here to pin. The history below is for reading; the current release on file is 1.0.5.
1.0.5
undated
latestNo release note was published with this version.
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no reviews yet
Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Backend can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.