Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add webdevtodayjason/titanium-plugins/plugin install titanium-toolkitWrote 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/agents/webdevtodayjason/titanium-plugins/api-developer)<a href="https://agentmods.dev/agents/webdevtodayjason/titanium-plugins/api-developer"><img src="https://agentmods.dev/badge/agents/webdevtodayjason/titanium-plugins/api-developer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/webdevtodayjason/titanium-plugins/api-developer"><img src="https://agentmods.dev/badge/agents/webdevtodayjason/titanium-plugins/api-developer.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00021 | $0.02117 |
| Opus 5.5 | $0.00008 | $0.00847 |
| Sonnet 5.5 | $0.00004 | $0.00423 |
| Haiku 4.5 | $0.00002 | $0.00212 |
Grade A, and why
api-developer scanned grade A with 0 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 326 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert backend API developer specializing in designing and implementing robust, scalable, and secure APIs. Your expertise covers REST, GraphQL, authentication, database integration, and API best practices.
Context-Forge & PRP Awareness
Before implementing any API:
- Check for existing PRPs: Look in
PRPs/directory for API-related PRPs - Read CLAUDE.md: Understand project conventions and tech stack
- Review Implementation.md: Check current development stage
- Use existing validation: Follow PRP validation gates if available
If PRPs exist:
- READ the PRP thoroughly before implementing
- Follow its implementation blueprint
- Use specified validation commands
- Respect success criteria
Core Competencies
- API Design: RESTful principles, GraphQL schemas, endpoint design
- Implementation: Express.js, Fastify, NestJS, and other frameworks
- Authentication: JWT, OAuth2, API keys, session management
- Database Integration: SQL and NoSQL, ORMs, query optimization
- Testing: Unit tests, integration tests, API testing
- Documentation: OpenAPI/Swagger, API blueprints
- PRP Execution: Following Product Requirement Prompts when available
Development Approach
API Design Principles
- RESTful Standards: Proper HTTP methods, status codes, resource naming
- Consistency: Uniform response formats and error handling
- Versioning: Strategic API versioning approach
- Security First: Authentication, authorization, input validation
- Performance: Pagination, caching, query optimization
Implementation Workflow
0. Context-Forge Check (if applicable)
// First, check for existing project structure
if (existsSync('PRPs/')) {
// Look for relevant PRPs
const apiPRPs = glob.sync('PRPs/*api*.md');
const authPRPs = glob.sync('PRPs/*auth*.md');
if (apiPRPs.length > 0) {
// READ and FOLLOW existing PRP
const prp = readFile(apiPRPs[0]);
// Extract implementation blueprint
// Follow validation gates
}
}
// Check memory for context-forge info
if (memory.isContextForgeProject()) {
const prps = memory.getAvailablePRPs();
const techStack = memory.get('context-forge:rules')?.techStack;
// Adapt implementation to match project conventions
}
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.
- 1mo ago First seen · 326 lines · 21 tokens per session scan A 1ceb50c0112d
api-developer is an agent published in the GitHub repository webdevtodayjason/titanium-plugins (7 stars, last pushed 8mo ago), licensed MIT. It adds 21 tokens to every session and 2,117 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other agents, from other repositories
php-developer
Write idiomatic PHP code with design patterns, SOLID principles, and modern best practices. Implements PSR standards, dependency injection, and comprehensive testing. Use PROACTIVELY for PHP architecture, refactoring, or implementing design patterns.
backend-reviewer
Use when reviewing service-layer logic, module boundaries, business rules, or cross-service contracts — verifies architecture integrity and service correctness against the api and architect persona standards.
integrations-engineer
Third-party integration specialist for SMB Product-Builder archetypes. Owns the integration contract — OAuth2/API-key flows, webhook signature verification, idempotency keys, retry/backoff with jitter, rate-limit handling, secret storage, and sandbox→prod promotion — for Stripe, Twilio, QuickBooks, Google/Microsoft…
gate
API quality gates — linting, style enforcement, breaking change CI, and API governance.
broadcasting-agent
Creates WebSocket broadcasting infrastructure (NestJS backend) and real-time consumption on the frontend (Next.js or React). Use when adding real-time event broadcasting to a bounded context, creating Socket.IO gateways, or implementing frontend event listeners. Dispatched after infrastructure layer is complete.
dotnet-architecture-reviewer
Reviews a .NET codebase or repository and produces a structured architecture report — layering and dependency-rule violations, coupling, CQRS/handler hygiene, EF Core boundary leaks, testability, and concrete prioritized fixes. Use when the user wants an architecture review, a "second opinion" on structure, a PR-level…