# Second Opinion (remote · secondopinionx402.com)

Adversarial verification for AI agents - pay an independent skeptic per verdict in USDC via x402.

- Trust score: 68/100 (medium)
- Change this week: +6
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `secondopinionx402.com`: 68/100 (this document), [markdown](https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402.md), [page](https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402)

## Channel facts

- Endpoint: `https://secondopinionx402.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 6 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 69/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 757 tokens (~126/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http com-secondopinionx402-second-opinion https://secondopinionx402.com/mcp
```

### Codex

```toml
[mcp_servers.com-secondopinionx402-second-opinion]
url = "https://secondopinionx402.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-secondopinionx402-second-opinion": {
      "type": "remote",
      "url": "https://secondopinionx402.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-secondopinionx402-second-opinion --url https://secondopinionx402.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-secondopinionx402-second-opinion:
    url: "https://secondopinionx402.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "com-secondopinionx402-second-opinion": {
      "type": "http",
      "url": "https://secondopinionx402.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 67, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 66, +2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 62, −1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 63)

First indexed and scored.

## MCP tools (6)

### `second_opinion_quick` (~174 tokens)

Independent reasoning-only check of a claim ($0.03, ~20s, no web research). Use for logic, internal consistency, and stable established knowledge (definitions, architectures, history, maths). Returns refuted/supported/inconclusive with calibrated confidence; honestly escalates to second_opinion_verify when the claim needs current-world research. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

Input parameters:

- `claim` (string, required): The single claim to verify, stated plainly.
- `context` (string): Why this claim matters / where it came from.
- `payment` (string): Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.

### `second_opinion_verify` (~173 tokens)

Independent adversarial verification with live web research ($0.20, ~60s). A separate AI attempts to refute the claim using current sources and returns a verdict with citations. Use before irreversible commitments that depend on current-world facts. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

Input parameters:

- `claim` (string, required): The single claim to verify, stated plainly.
- `claimed_sources` (array): URLs you relied on — they will be scrutinised, not trusted.
- `context` (string): Why this claim matters / where it came from.
- `payment` (string): Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.

### `second_opinion_panel` (~152 tokens)

Three independent adversarial verifiers attack the claim through different lenses (evidence, logic, currency) and vote ($0.75, ~90s). Use for high-stakes or contested claims where a single check is not enough. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

Input parameters:

- `claim` (string, required): The single claim to verify, stated plainly.
- `context` (string): Why this claim matters / where it came from.
- `payment` (string): Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.

### `second_opinion_try` (~135 tokens)

FREE TRIAL — no wallet, no payment, no account: the same quick reasoning-only check as second_opinion_quick, 3/day per caller (claims up to 500 chars; global daily cap applies). The trial verdict is unsigned — paid verdicts add an offline-verifiable Ed25519 receipt and live web research on the verify/panel tiers. Try the product here; use the paid tools for real work.

Input parameters:

- `claim` (string, required): The single claim to verify, stated plainly (free trial: max 500 chars).
- `context` (string): Why this claim matters / where it came from.

### `second_opinion_result` (~63 tokens)

Fetch the verdict for a paid async job — polling is FREE and the verdict is already paid for. Returns status running|done|failed, with the full verdict when done.

Input parameters:

- `job_id` (string, required): The job id returned by a paid verification tool call.

### `second_opinion_pricing` (~60 tokens)

FREE: current tiers, prices, and exact on-chain payment requirements (accepts) for every rail — Algorand, Base, Solana. Use this to pre-build a payment, or to discover what a verification will cost before committing.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402#diagnostics

## Score history

- 2026-08-03: 68
- 2026-08-02: 67
- 2026-08-01: 67
- 2026-07-31: 67
- 2026-07-30: 66
- 2026-07-29: 64
- 2026-07-28: 63
- 2026-07-27: 62
- 2026-07-26: 63

## Links

- Remote endpoint: https://secondopinionx402.com/mcp
- Website: https://secondopinionx402.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402/changelog.json
- HTML version of this page: https://verifymcp.io/servers/com-secondopinionx402-second-opinion/secondopinionx402