Guía práctica de APIs para builders y agentes de IA
Tutoriales, comparativas y casos de uso para fundamentar respuestas de LLMs, construir flujos de agentes y llevar funciones de IA a producción.
Google Patents API Is Dead — 6 Alternatives for Prior-Art and Freedom-to-Operate Search
Google Patents Public Datasets retired without a documented replacement, and the USPTO migrated PEDS into a new Open Data Portal mid-2026, breaking pipelines on the way. Here's what actually works in 2026 for prior-art, FTO, and IP-research workloads — six alternatives, side by side.
How to Build a Scientific Literature-Review Agent Without Getting Rate-Limited
Build a literature-review agent on raw arXiv + PubMed + Semantic Scholar today and you'll hit 429s before you finish ten papers. Here's why the rate limits got worse, what PaperQA / Undermind actually do under the hood, and a working pattern that survives a real review session.
Polymarket vs Kalshi API: A Developer's Side-by-Side Guide (Auth, CLOB, WebSocket, Historical Data)
Polymarket and Kalshi run the same primitive — yes/no contracts on a CLOB — through completely different APIs. One demands EIP-712 signatures and a Polygon wallet; the other is a REST endpoint with optional FIX. If you're building a forecasting agent, an arbitrage bot, or a smart-money monitor, here's the side-by-side guide that should already exist.
Citation-Grounded UK Case Law Retrieval After Ayinde v Haringey
Ayinde v Haringey changed the calculus for UK legal AI overnight. A barrister cited five fake cases generated by an LLM and got referred to the Bar Standards Board. Hallucinated citations now have professional-conduct consequences. Here's the developer's guide to building citation-grounded UK case law retrieval — TNA Find Case Law, legislation.gov.uk, neutral-citation parsing, and how to wire it into a working agent.
Wiring ClinicalTrials.gov v2 + openFDA + ChEMBL into a License-Clean Drug Intelligence Endpoint
Pharma R&D, medical-AI startups, and pharmacovigilance teams all want the same thing: one endpoint that pulls trials, labels, adverse events, and bioactivity in a license-clean way. Here's the working architecture, with the trap doors that have surprised teams in production.
Build a Research Agent with Search + URL Extract (Claude tool use, end-to-end)
Most 'AI research agent' tutorials stop at 'here's a tool definition.' This one ships a working agent: question in, cited answer out. Search, extract, reason, cite — all under 120 lines of Python.
Building a Due-Diligence Agent on SEC Filings (10-K, 10-Q, 8-K, Earnings)
Reading a 10-K is mostly Ctrl+F. Doing it for fifty companies is a job. Replace the boring 80% with a search-and-extract agent against SEC EDGAR — keep the 20% that matters for the human analyst.
Why APIs Should Charge Only on Success — The Case for HTTP-200 Billing
Most APIs charge on every billable call. AI agents retry on flaky upstream services constantly — which means the legacy 'always charge' model effectively taxes resilience. Here's the case for billing only on HTTP 200, and what it changes about how you design agents.
Tavily vs Exa vs Serper vs API Pick: ¿qué API de Web Search elegir para LLMs?
Tavily, Exa, Serper y API Pick prometen ser la capa de búsqueda de tu LLM. Difieren bastante en forma de salida, filtros y facturación. Comparativa de alguien que envía agentes a producción.
Firecrawl vs Jina Reader vs API Pick: APIs de extracción de URLs comparadas
Si has enviado un agente que lee URLs y las resume, ya pagaste el 'impuesto de limpieza de URL'. Firecrawl, Jina Reader y API Pick Extract resuelven el problema distinto. Comparativa práctica.
Cómo añadir Web Search en tiempo real a un agente OpenAI o Claude en 4 pasos
¿Quieres que tu agente fundamente respuestas con información actual? Necesitas exactamente dos cosas: una API de búsqueda que devuelva snippets listos para LLM y una definición de herramienta que el modelo pueda llamar. Esta guía hace ambas en 4 pasos.
Construye un agente de briefing matutino con la News Search API
Fundadores, PMs y analistas quieren lo mismo a las 8am: un digest limpio de qué cambió durante la noche. Con una News Search API, un LLM y una plataforma con cron, lo construyes en una tarde.