Borrowing it
Nothing to install: this file belongs to mtnyilmaz/agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mtnyilmaz/agents/main/.agents/skills/sast-graphql/SKILL.mdgit clone --depth 1 https://github.com/mtnyilmaz/agentsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mtnyilmaz/agents/sast-graphql)<a href="https://agentmods.dev/skills/mtnyilmaz/agents/sast-graphql"><img src="https://agentmods.dev/badge/skills/mtnyilmaz/agents/sast-graphql.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00115 | $0.03483 |
| Opus 5 | $0.00057 | $0.01741 |
| Sonnet 5 | $0.00023 | $0.00697 |
| Haiku 4.5 | $0.00012 | $0.00348 |
Grade A, and why
sast-graphql scanned grade A with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Sends data to an external URLlowData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
const data = await fetch('https://api.internal/graphql', { method: 'POST', Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
> - `JSON.stringify({ query: `...${userPart}...` })`, `axios.post(url, { query: builtFromInput })` How it starts
The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GraphQL Injection Detection
You are performing a focused security assessment to find GraphQL injection vulnerabilities. This skill uses a two-phase approach with subagents: recon (confirm GraphQL usage and find every location where a GraphQL operation document is assembled unsafely) then taint (confirm whether user-supplied input reaches those assembly sites).
Prerequisites: sast/architecture.md must exist. Run the analysis skill first if it doesn't.
What is GraphQL Injection
GraphQL injection occurs when user-controlled data is embedded into the GraphQL document (the query, mutation, or subscription string) rather than passed only through the variables map. The parser then interprets attacker-controlled syntax — new fields, aliases, directives, or fragments — which can bypass intent, reach unauthorized resolvers, or change server-side behavior when that document is executed or forwarded.
The core pattern: unvalidated user input alters the structure or text of the GraphQL operation string passed to execute, graphql, a gateway client, or an HTTP body query field built from string operations.
What GraphQL Injection IS
- Concatenating or interpolating user input into an operation string:
`query { user(id: "${id}") { name } }`,"query { user(id: \"" + id + "\") { name } }" - Building the JSON
queryfield for a downstream GraphQL HTTP request with string concat from request body or params - Forwarding
req.body.query(or similar) into another interpolated template that wraps or extends the operation - Dynamic
gql/graphql-tagtemplate literals where a non-static expression changes document structure (not just a bound variable value inside a static document) - Server-side code that selects or assembles operation text from user input (including "persisted query" ID → document maps without allowlisting)
- Wrappers around
graphql.execute(),graphqlHTTP, Yoga/Apollo request pipeline where the first argument (document/source) is built from variables that could be user-influenced
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 309 lines · 115 tokens per session scan A 59fb8942fcca
sast-graphql is a skill published in the GitHub repository mtnyilmaz/agents (6 stars, last pushed 3mo ago), licensed MIT. It adds 115 tokens to every session and 3,483 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
omni-mcp
Connect to the OmniRoute MCP server (110 tools, 3 transports: SSE/stdio/HTTP). Covers routing, cache, compression, memory, skills, providers, and audit tools across 33 permission scopes.
mem0-oss-to-platform
Plan and then execute a migration of a project from the mem0 open-source / self-hosted SDK (the local Memory class) to the mem0 Platform / hosted / managed SDK (the MemoryClient class). Use this whenever a developer wants to move, switch, or migrate their mem0 usage off OSS/self-hosted to the hosted API — e.g.…
agui-dotnet-protobuf
Use the protobuf wire transport (instead of the default Server-Sent Events) for an AG-UI connection with the AG-UI .NET SDK — a compact binary event stream negotiated via the Accept header. USE FOR: making an AGUIChatClient prefer protobuf by wiring an AGUIEventStreamHandler with ProtobufEventStreamFormatter (then…
azure-mgmt-botservice-dotnet
Azure Resource Manager SDK for Bot Service in .NET. Management plane operations for creating and managing Azure Bot resources, channels (Teams, DirectLine, Slack), and connection settings. Triggers: "Bot Service", "BotResource", "Azure Bot", "DirectLine channel", "Teams channel", "bot management .NET", "create bot".
fastapi-router-py
Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new routes, implementing CRUD operations, or adding authenticated endpoints in FastAPI applications.
telnyx-messaging-hosted-curl
Set up hosted SMS numbers, toll-free verification, and RCS messaging. Use when migrating numbers or enabling rich messaging features. This skill provides REST API (curl) examples.