Fuci
REMOTE · WWW.FUCI.FAMILY
AI agents on Arc: search paid x402 APIs, ERC-8004 reputation, Argus launch data paid in USDC.
Available components
Last scanned (1 hour ago)
Scores higher than 8% of remote servers
Unreachable for 1 day in a row. Last reached 10 Nov 2026.
Category Crypto and Web3
Recent critical change
TLS certificate (11 Nov 2026). See the changelog before you install this server.
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security11
- TLS check failed: the certificate doesn't match the endpoint's hostname. See how to fix → View diagnostics → Fail
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS not yet verified: we couldn't read the response headers to check for it. View diagnostics → Unverified
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but the TLS certificate failed verification. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Checks we ran (4)
- TLS certificate
- HTTPS
- DNSSEC
- Transport
Checks we could not complete (7)
These are gaps on our side, not findings about this hosted endpoint. We only credit what we can confirm, so a category made up entirely of them scores 0.
- Authorization in Endpoint SecurityAuthorisation not yet verified: we couldn't confirm whether this endpoint requires it.
- HSTS header in Endpoint SecurityHSTS not yet verified: we couldn't read the response headers to check for it.
- Schema quality in Schema Quality & AI Usability (scores 0 for this)Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- Stability in Stability & Change Management (scores 0 for this)Stability not yet verified: not enough scan history yet (needs a 30-day window).
- Tool coverage in Tool Coverage (scores 0 for this)Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- Tool safety in Tool Safety (scores 0 for this)Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- Capabilities in Capabilities (scores 0 for this)Capabilities not yet verified: we couldn't read the endpoint's capabilities.
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
Where what the registry lists and what we observed about the package disagree. This is read from the stored diagnostics and is never an input to the score.
TLS certificate hostname
- Registry says
https://www.fuci.family/api/mcp- Package shows
Certificate names *.up.railway.app, up.railway.app
The certificate does not name the host we connected to. See the evidence →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 11 Nov 26 0
- TLS certificate: pass → fail ▼ critical
- Score status: scored → failed ▼ critical
- Endpoint reachability: not serving MCP → unreachable ▼ security
- HSTS header: fail → unverified ▼ security
- Transport: Transport check failed: declared streamable-http, but the TLS certificate failed verification. security
- 7 Nov 26 0
- Endpoint reachability: unreachable → not serving MCP ▼ security
- 6 Nov 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 5 Nov 26 0
- Endpoint reachability: not serving MCP → unreachable ▼ security
- HSTS header: fail → unverified ▼ security
- TLS certificate: pass → unverified ▼ security
- Transport: Transport check failed: declared streamable-http, but we couldn't connect to verify it. security
- 25 Oct 26 −2
- HSTS header: pass → fail ▼ security
- 15 Oct 26 −59
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: 0.60 → unverified ▼ security
- Authorization: partial → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 14 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Sept 26 0
- Schema quality: 731 → 827 ▼ functional
- New tool “fuci_quick” functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 11 Nov 2026 · Probed https://www.fuci.family/api/mcp
TLS invalid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
Chain error: Hostname mismatch
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.up.railway.app | CN=YE2,O=Let's Encrypt,C=US | 27 Sept 2026 | 26 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 618edc56941aa1165ddb080bf9f799eb7c1 |
| SANs: *.up.railway.app, up.railway.app | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.fuci.family. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| family. | DS published | 51152 | 8 | Verified |
| fuci.family. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.fuci.family/api/mcp | TLS failed | ||
| http (plaintext) | http://www.fuci.family/api/mcp | HTTPS enforced | 301 | https://www.fuci.family/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
argus_bonding Bonding Watcher ~65
Price, progress toward bonding, taxes and recent buys and sells for one Argus token. Price: $0.002 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| token | string | – | Token address (0x…) of an Argus launch (default: $FUCI) |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
argus_launches Argus Launch Scout ~71
Latest token launches on Argus, the launchpad on Arc: who launched them, their pool and their buy/sell tax. Price: $0.001 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | How many launches to return, newest first (1–20, default 8) |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
fuci_agent Ask the Fucus Agent ~95
Pay-per-prompt: a Fuci agent answers your question by buying the tools above, and up to 0.02 USDC of data from other sellers in Fuci Market when it helps (each seller checked with Know Your Agent), then writes a brief (with Claude when enabled). Price: $0.04 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| prompt | string | – | Your question about Argus launches / Arc markets |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
fuci_kya Know Your Agent ~109
Check another AI agent before you pay, hire or trust it: an A–F trust grade from its ERC-8004 identity, registration file, on-chain reputation and validations, wallet activity, USDC balance and x402 payment record, each explained with its source. Price: $0.002 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | An ERC-8004 agent id on Arc (e.g. 12) or the agent's wallet address (0x…) |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
fuci_quick Quick Answer ~96
Pay-per-prompt, for simple questions: a Fuci agent buys Fuci's Argus tools (launches, bonding, market mood) and answers in a few sentences with a small, fast model. For token picks and trading strategies, use Ask the Fucus Agent. Price: $0.01 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| prompt | string | – | A short question about Argus launches / Arc markets |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
fuci_reputation ERC-8004 reputation ~45
Free. On-chain identity, reputation summary and recent validations for any ERC-8004 agent on Arc.
| Name | Type | Req | Description |
|---|---|---|---|
| agentId | number | yes | ERC-8004 agentId |
| Name | Type | Req | Description |
|---|---|---|---|
| directory | object|null | – | Rank in the Fuci agent directory, if listed |
| reputation | object | yes | Reputation summary from the ERC-8004 Reputation Registry |
| validations | array | yes | Recent ERC-8004 validations |
No examples provided.
fuci_risk Risk Rating ~97
A graded risk report (A–F) for a token on Arc or a DeFi protocol: contract control, liquidity, holder concentration, audits, hack history, TVL and yield sustainability, each explained with its source. Price: $0.002 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| target | string | – | Token address on Arc (0x…) or a DefiLlama protocol slug (e.g. morpho-blue) |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
fucus_oracle Tide Oracle ~70
A tide reading: net USDC flow and sentiment across the newest Argus launches, in one sentence. Price: $0.0005 USDC (x402).
| Name | Type | Req | Description |
|---|---|---|---|
| launches | integer | – | How many of the newest launches to read trades from (1–6, default 4) |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | – | JSON body for POST tools |
| method | string | yes | HTTP method to call with an x402 client |
| url | string | yes | URL to call; it answers 402 with the price, then the data once paid |
No examples provided.
market_search Fuci Market search ~73
Free. Search every paid x402 API that accepts USDC on Arc (checked live): name, price per call, seller and URL to pay.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | Max results (1-25) |
| query | string | yes | What you need, e.g. 'web search' or 'token price' |
| Name | Type | Req | Description |
|---|---|---|---|
| listings | array | yes | – |
| total | number | yes | Number of listings returned |
No examples provided.
How do I install the Fuci MCP server?
Fuci is a hosted endpoint at https://www.fuci.family/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · www.fuci.family
claude mcp add --transport http family-fuci-www-fuci 'https://www.fuci.family/api/mcp'
What is the Fuci MCP server?
Fuci is an MCP server listed in the public MCP registry as family.fuci.www/fuci. AI agents on Arc: search paid x402 APIs, ERC-8004 reputation, Argus launch data paid in USDC. This page covers its hosted endpoint (https://www.fuci.family/api/mcp).
What tools does the Fuci MCP server expose?
Fuci exposes 9 tools: fuci_reputation, market_search, argus_launches, argus_bonding, fucus_oracle, and 4 more. Their descriptions and schemas cost roughly 721 tokens of context every time the server is loaded.
Does the Fuci MCP server require authentication?
Its publisher declares no required credentials for Fuci. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.
Is the Fuci MCP server still maintained?
Fuci is still listed in the MCP registry, though our most recent checks did not reach this channel. We last reached this channel on 10 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.