Pebbler Human Feedback
NPM · @PEBBLER/PEBBLER-MCP
Buy human image preference comparisons on the Pebbler app with locally controlled USDC payments.
Available components
Last scanned (6 hours ago)
Scores higher than 48% of npm servers
Category Marketing and SEO
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security90
- No malware found by supply-chain analysis.Pass
- CVE check failed: a known high-severity CVE affects zod 3.25.76, reached via @x402/core > zod. A fixed version is available. View diagnostics → Fail
- No install/post-install scripts declared.Pass
- 30 of 111 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 30 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability68
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 445 tokens (~63/item across 7 items; 7 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management73
- Stability observed for 22 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 14% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
- 5 Nov 26 0
- Security disclosure: unverified → fail ▼ functional
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
- Security disclosure: fail → unverified ▼ functional
- 31 Oct 26 +1
- Security disclosure: unverified → fail ▼ functional
- 30 Oct 26 0
- Security disclosure: fail → unverified ▼ functional
- 28 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 24 Oct 26 −2
- CVE-2023-54404 affects this package: high ▼ security
- Known CVEs: pass → fail ▼ security
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 5 Nov 2026 · Analysed npm/@pebbler/pebbler-mcp@0.1.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Vulnerabilities 1 finding
| ID | CVE | Severity | Vector | Fix available |
|---|---|---|---|---|
| GHSA-mrhx-c7xc-m3w5 | CVE-2023-54404 | high | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | yes |
Background: What a vulnerability scan can and cannot prove →
Dependencies 111 packages
| Packages resolved | 111 |
|---|---|
| Stale | 30 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
create_study ~82
Validate an immutable preference comparison with two HTTPS image options. Version 1 supports A vs B image tests only. Free. Reuse request_key to recover a failed creation. Returns the study ID and quote; access credentials stay in the local adapter.
| Name | Type | Req | Description |
|---|---|---|---|
| request_key | string | yes | Stable identifier for this creation, reused on retries. |
| study | object | yes | – |
No output schema declared.
No examples provided.
get_catalog ~29
Read supported image comparison format, price, respondent slots and schemas. Free; use before creating a study.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_study_results ~45
Retrieve aggregate image preference votes. Free and included in purchase. Responses are from incentivised Pebbler app participants and may be incomplete.
| Name | Type | Req | Description |
|---|---|---|---|
| study_id | string | yes | – |
No output schema declared.
No examples provided.
get_study_status ~47
Get order state and collection progress. Free; honour poll_after_seconds. For pending settlement or launch, retry purchase_study with its original identifiers.
| Name | Type | Req | Description |
|---|---|---|---|
| study_id | string | yes | – |
No output schema declared.
No examples provided.
list_local_studies ~39
List study IDs and purchase identifiers retained by this adapter. Free; use to recover work after restarting. Does not expose wallet keys or access credentials.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
purchase_study ~78
Purchase and schedule the quoted study using the locally configured wallet. Charges USDC, subject to code-enforced budgets. Reuse the original idempotency_key on every retry. Pending payment/launch responses must be recovered through this same tool without another payment.
| Name | Type | Req | Description |
|---|---|---|---|
| idempotency_key | string | yes | – |
| study_id | string | yes | – |
No output schema declared.
No examples provided.
quote_study ~39
Refresh an unpaid study's quote. Free. Do not refresh after signing a payment; recover that purchase instead.
| Name | Type | Req | Description |
|---|---|---|---|
| study_id | string | yes | – |
No output schema declared.
No examples provided.
How do I install the Pebbler Human Feedback MCP server?
Pebbler Human Feedback runs locally as an npm package, launched with npx -y @pebbler/pebbler-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @pebbler/pebbler-mcp
claude mcp add bridge-applications-pebbler-mcp -- npx -y @pebbler/pebbler-mcp
What is the Pebbler Human Feedback MCP server?
Pebbler Human Feedback is an MCP server listed in the public MCP registry as io.github.bridge-applications/pebbler-mcp. Buy human image preference comparisons on the Pebbler app with locally controlled USDC payments. This page covers its npm package (@pebbler/pebbler-mcp).
Is the Pebbler Human Feedback MCP server safe to use?
Pebbler Human Feedback scores 74 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Pebbler Human Feedback MCP server expose?
Pebbler Human Feedback exposes 7 tools: get_catalog, create_study, quote_study, purchase_study, get_study_status, and 2 more. Their descriptions and schemas cost roughly 359 tokens of context every time the server is loaded.
Is the Pebbler Human Feedback MCP server still maintained?
Pebbler Human Feedback is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Pebbler Human Feedback MCP server under?
Pebbler Human Feedback declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.