same entity graph · different contract
A catalog for agents, not a reskinned brochure
Capability matrices, SKILL.md, OpenAPI, and a CC BY 4.0 dataset — around a live obsidian relic. We do not ship a fake MCP manifest.
Build Something Agents Want is the machine-first twin of Build Something People Want. Same product slugs, Twin Scores, and editorial rules. Use this site when you need to call an API, write a skill file, or download scores. Use the people twin when you need a comparison essay. Developer resources are titled “Build Something Agents Want developer resources”.
Public JSON API: GET /api/v1/products · GET /api/v1/products/chatgpt · openapi.json · llms.txt. Errors are RFC 9457 application/problem+json with code, detail, and status (400/404/405 on /api/v1/*).
Skill files
SKILL.md
When to use, when not. Real files, not a fake MCP listing.
HTTP
OpenAPI
JSON API with RFC 9457 errors. No key for read.
CC BY 4.0
Dataset
Twin Scores as JSON and CSV. Recompute from the rubric.
Negotiation
llms.txt
Markdown on Accept. The hall stays machine-readable.
Highest agent Twin Scores
Editorial, not user-count ratings
payments
Stripe
Stripe is the internet's default payments API: Checkout, Billing, Connect, Tax, Treasury, and Identity. The Dashboard is a fine human surface. The product is the API — versioned, idempotent, documented with copy-paste recipes. Agent Twin Score is among the highest in this.
developer-tools
OpenAI Platform
The OpenAI Platform is the developer product: models, embeddings, speech, images, batch, fine-tuning, and the dashboard that holds keys. ChatGPT is the consumer twin; this is the machine twin. Docs, playground, and SDKs are why almost every demo starts here. We keep it as its.
developer-tools
GitHub
GitHub is the default public source host and a full DevOps surface: issues, PRs, Actions, Packages, Codespaces, and security scanning. Humans live in the PR timeline. Agents live in the REST and GraphQL APIs, Checks, and workflow YAML. Few products have a more complete twin:.
infrastructure
Resend
Resend is a transactional email API with React-email ergonomics and a calm dashboard. Humans inspect deliveries. Agents send mail. Documentation is the product, which is why the agent Twin Score sits next to Stripe. We do not confuse a pretty dashboard with a complete ESP for.
developer-tools
Anthropic API
Anthropic's API is the Messages API, tool use, prompt caching, and long context — the machine product behind Claude. Console and workbench help humans. Agents get clean JSON, streaming, and relatively honest limit documentation. Available also via AWS Bedrock and Google.
infrastructure
Supabase
Supabase is the open-source Firebase alternative: Postgres, Auth, Storage, Realtime, and Edge Functions with a studio GUI. Humans click tables. Agents use the REST and JS clients, RLS, and the CLI to migrate. This directory itself targets a Supabase project. We score the.
infrastructure
Cloudflare
Cloudflare is DNS, CDN, DDoS, Zero Trust, Workers, R2, D1, and a dozen more edges. Humans click orange-cloud DNS. Agents live in the API, wrangler CLI, and Terraform provider. Few companies have a broader worldwide footprint. We catalog Cloudflare as one entity because that.
ai-assistants
Claude
Claude is Anthropic's family of constitutional-AI models and the claude.ai workbench. It is widely used for long-context writing, coding, and careful tool use. Artifacts, Projects, and the desktop-class chat UI serve humans; the Messages API, tool use, computer-use betas, and.
infrastructure
Neon
Neon is serverless Postgres with database branching: copy-on-write branches for preview apps, scale-to-zero compute, and a genuine Postgres wire protocol. The console is fine. The API and CLI are how you create a branch per pull request, which is the agent job. Humans who.
infrastructure
Amazon Web Services
AWS is the default public cloud: compute, storage, data, and a console that overwhelms newcomers. Human Twin Score is middling because the console and naming are a tax. Agent Twin Score is excellent because everything is an API, the CLI is real, and IAM is the most.
data
Datadog
Datadog is the full-stack observability suite: infra, APM, logs, RUM, security. Dashboards are the human surface. Agents, DogStatsD, and the HTTP API are how you actually monitor a fleet. Pricing complexity is part of the review, not a footnote.
ai-assistants
ChatGPT
ChatGPT is OpenAI's consumer and business assistant, wrapping GPT models in a chat UI with memory, browsing, image generation, and custom GPTs. The public product launched in November 2022 and became the default way millions of people try large language models. The API lives.
Build Something Agents Want developer resources · JSON dataset · JSON API · OpenAPI