Agent builder index

Agentic APIs that are worth integrating

Curated API registry with implementation metadata builders need before shipping: auth style, tool-calling support, pricing hints, docs quality, and known integration gotchas.

Registry

6 APIs

agent runtimedocs hightool-calling native

OpenAI Responses API

OpenAI

Unified response endpoint for text, tools, and multimodal interactions.

Auth: api_key

Rate limits: Tier-based limits per model and account.

Pricing: Token-based pricing by model family.

Gotcha: Schema/tool definitions can drift across model upgrades; pin regression checks.

responses_apitool_callingproduction
model runtimedocs hightool-calling native

Anthropic Messages API

Anthropic

Claude model runtime with long-context reasoning and structured tool use.

Auth: api_key

Rate limits: Tiered request/token limits; throughput varies by model.

Pricing: Input/output token pricing varies by model size.

Gotcha: Tool argument formatting and stop reasons need strict parser handling.

claudetool_uselong_context
model runtimedocs mediumtool-calling partial

OpenRouter

OpenRouter

Multi-provider model routing API for fast experimentation and fallback.

Auth: api_key

Rate limits: Provider-dependent quotas plus account-level controls.

Pricing: Pass-through pricing plus routing overhead depending on model/provider.

Gotcha: Model availability and capabilities can shift by upstream provider.

routingmulti_providerfallback
memory vectordocs hightool-calling none

Pinecone

Pinecone

Managed vector database for retrieval and long-term agent memory.

Auth: api_key

Rate limits: Index size and operation-based limits by plan.

Pricing: Usage and capacity based.

Gotcha: Index design and metadata filtering strategy directly impact latency.

vector_dbragmemory
eval observabilitydocs hightool-calling partial

LangSmith

LangChain

Tracing, eval, and observability tooling for LLM and agent workflows.

Auth: api_key

Rate limits: Event and trace ingestion limits by plan.

Pricing: Usage-based tracing/eval tiers.

Gotcha: Without consistent run metadata, comparisons become noisy quickly.

observabilityevalstracing
tool executiondocs mediumtool-calling partial

Browserbase

Browserbase

Cloud browser sessions for autonomous browsing and workflow automation.

Auth: api_key

Rate limits: Concurrent session quotas by plan.

Pricing: Session-minute based pricing.

Gotcha: Session warm-up and anti-bot behavior can distort benchmark timings.

browser_useautomationagent_tools

Live agentic update stream

Signals from the core feed that mention agent runtimes, tool-calling APIs, orchestration, or memory stack updates.

pricing changeBusiness Standard

AI is shopping for you now. What does that mean for ecommerce in India?

AI agents could soon handle shopping decisions and transactions for consumers, forcing ecommerce, travel, and insurance platforms to rethink pricing, customer engagement, and security

newsOpenAI

OpenAI says its models interacted with US government websites in unexpected ways

OpenAI disclosed on Friday that its artificial intelligence agents had interacted with several US government websites in unexpected ways, discovered as part of an ongoing review into the company’s models’ unanticipated behaviour. The AI giant’s models accessed publicly available information on two websites operated by the Securities and Exchange Commission as well as US Census […]

newsOpenAI

Rogue OpenAI agents accessed US government websites without its knowledge

OpenAI has confirmed that its artificial intelligence (AI) models accessed the websites of the US Department of Commerce and Securities and Exchange Commission (SEC) this summer.

newsOpenAI

OpenAI agents spent months probing databases to find obscure facts

A new report from Transluce, a non-profit lab dedicated to AI oversight, has revealed that OpenAI's artificial intelligence (AI) agents have been probing secure online databases.

newsOpenAI

Rogue OpenAI agents leaked 53 images from ChatGPT users

OpenAI's artificial intelligence (AI) agents have inadvertently leaked 53 user-provided images on public image hosting sites.

newsOpenAI

OpenAI’s huge update after Medicare breach

OpenAI has revealed its rogue artificial intelligence agents have interfered with the websites of dozens of organisations around the world, days after it was revealed one of its bots hacked into an Australian government portal containing Medicare data.

newsOpenAI

OpenAI says AI agents interacted with Education, Commerce, SEC websites in US

OpenAI said Friday found its AI agents may have bypassed security controls, disrupted services, or otherwise affected outside websites during training.

newsOpenAI

Australia not alone as OpenAI agents hacked other websites

OpenAI says dozens more third parties were affected by rogue agents bypassing website security controls, as new traces reveal days of attempts to access Australian health data.