A-

mcp.nullary.ai

Item: mcp.nullary.ai
Rating: 92
Author: wmcp.sh

https://mcp.nullary.ai/mcp

92/100 · MCP Trust Grade · checked 4h ago · MCP 2025-06-18

✓ Watched since 2026-06-03 — behavioral baseline locked. We re-check this server's tool surface on a schedule; if it adds, removes, or silently rewrites a tool (rug-pull), we record it.

What it offers — 35 tools · Search

search_inactive_compounds

Inactive small-molecule compound-target pairs.

search_failed_selectivity

Small molecules that failed selectivity.

search_admet_failures

Small-molecule ADMET failures.

search_failed_guides

Failed/ineffective CRISPR guides.

search_failed_essentiality_screens

Non-dependency / failed essentiality screens.

search_ancestry_specific_failures

Ancestry-specific CRISPR failures.

search_developability_failures

Antibody developability failures.

search_failed_clinical_antibodies

Discontinued/terminated clinical antibodies.

search_failed_peptide_therapeutics

Failed peptide therapeutics.

search_peptide_stability_issues

Peptide stability/half-life failures.

search_failed_protacs

PROTACs that failed degradation/ternary/permeability.

search_protac_e3_issues

PROTAC E3-ligase recruitment / ternary failures.

search_failed_oligonucleotides

ASOs/siRNAs that failed engagement/developability.

search_oligo_delivery_failures

Oligonucleotide delivery failures.

search_failed_vaccines

Failed/terminated vaccines (by pathogen/indication).

search_vaccine_immunogenicity_failures

Failed vaccine immunogen designs.

search_failed_adcs

ADCs that failed at any stage.

search_adc_linker_failures

ADC failures attributed to linker chemistry.

+17 more tools

Spec conformance20%100

✓ initialize → protocolVersion 2025-06-18
✓ initialize HTTP 200
✓ unknown method → -32601
✓ tools/list → 35 tools
✓ every tool has name + inputSchema

Security (OWASP MCP)30%100

35 tools scanned
no injection markup
no secret-path refs

Reliability / performance20%84

single-probe latency 1461ms (PRELIMINARY — continuous uptime/p95 from proxy telemetry lands in v2)

Tool hygiene15%96

94% of tools have typed inputSchema
35/35 declare outputSchema
no unannotated destructive tools

Transparency / provenance15%70

HTTPS ✓
advertises protocol 2025-06-18

Observed behavior

No proxied traffic observed for this host yet. Connect it at /connect and its grade gains a measured Reliability score + per-tool behavioral evidence — the half a static scan can't produce.

Findings

No blocking issues found in the static + spec checks.

Grade another server

We re-grade mcp.nullary.ai on a schedule and alert your Slack/webhook the moment its tools change or its grade drops — rug-pull insurance for the connection.

Share this report card

A 1200×630 card with the grade + audit — drop it in a post, Slack, or your repo.

MCP Trust report card — mcp.nullary.ai grade A-

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https://wmcp.sh/mcp/grade/mcp.nullary.ai

Embed this grade

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Markdown (for your README)

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HTML

<a href="https://wmcp.sh/mcp/grade/mcp.nullary.ai"><img src="https://wmcp.sh/mcp/grade/mcp.nullary.ai/badge.svg" alt="MCP Trust Grade A- · wmcp.sh"></a>

Agents: check this before connecting

Add the wmcp.sh trust oracle as an MCP server and call grade_mcp_server / check_mcp_drift in your agent's pre-connection gate:

https://wmcp.sh/mcp/trust

How this grade is computed. An open, independent rubric — Spec conformance (20%), Security mapped to the OWASP MCP Top 10 (30%), Reliability (20%), Tool hygiene (15%), Transparency (15%) — run by connecting to the server and inspecting its real MCP surface. The grade is free and identical whether or not the operator pays. v1 uses static + spec signals from a single connection; continuous uptime, real latency, and annotation-truthing (declared readOnly vs observed behavior) layer on via the wmcp.sh proxy.