- name
- web-api-enumeration
- description
- REST API discovery, GraphQL detection, parameter fuzzing.
- allowed-tools
- Bash Read Write
- metadata
- {"subdomain":"reconnaissance","when_to_use":"API enumeration, swagger, openapi, GraphQL, introspection, parameter fuzzing, REST endpoints","tags":"api-enum, graphql, swagger, parameter-discovery","mitre_attack":"T1595.003"}
# Web API Enumeration & Parameter Discovery
Surface REST/GraphQL endpoints and the parameter surface of known endpoints. This sub-skill covers everything between "the directory tree is mapped" and "I know what to fuzz".
## 1. API Endpoint Enumeration
### REST API Discovery
```bash
# Common API paths
ffuf -u https://<target>/api/FUZZ -w /usr/share/wordlists/api-endpoints.txt -mc 200,201,401,403,405
# Version enumeration
for v in v1 v2 v3; do
ffuf -u "https://<target>/api/$v/FUZZ" -w api-wordlist.txt -mc 200,201,401,403
done
# Check for Swagger/OpenAPI docs
for doc in swagger.json openapi.json api-docs docs/api swagger/v1/swagger.json; do
code=$(curl -s -o /dev/null -w "%{http_code}" "https://<target>/$doc")
echo "$code $doc"
done
```
### GraphQL Detection
```bash
# Common GraphQL endpoints
for path in graphql graphiql playground api/graphql; do
# Introspection query
curl -s -X POST "https://<target>/$path" \
-H "Content-Type: application/json" \
-d '{"query":"{__schema{types{name}}}"}' | head -c 200
echo " → $path"
done
```
### API Key/Token Patterns
Look for in responses:
- `api_key`, `apiKey`, `access_token`, `bearer`, `jwt`
- Base64-encoded blobs in cookies or headers
- `Authorization` header patterns
## 2. Parameter Discovery
```bash
# GET parameter fuzzing
ffuf -u "https://<target>/page?FUZZ=test" -w /usr/share/wordlists/params.txt -mc 200 -fs <default_size>
# POST parameter fuzzing
ffuf -u "https://<target>/login" -X POST \
-d "FUZZ=test" -H "Content-Type: application/x-www-form-urlencoded" \
-w /usr/share/wordlists/params.txt -mc 200 -fs <default_size>
# Header fuzzing
ffuf -u "https://<target>/" -H "FUZZ: test" \
-w /usr/share/wordlists/headers.txt -mc 200 -fs <default_size>
```
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