Perplexity's search API in 2026: a guide for agent builders
A practical guide to Perplexity's search API: payload shape, freshness filtering, pricing, and when it beats Exa or Serper for AI agent workloads.
Read the field note →How to audit what your AI agent actually spends per task
How to audit what your AI agent spends per task: a unit-economics worksheet with real per-call tool prices and where the savings usually hide.
Kling vs Wan 2.2: the two hosted text-to-video APIs compared
Kling vs Wan 2.2 for API video generation in 2026: per-second pricing math, async job realities, quality scores, and which one to route first.
Code sandbox security for AI agents: what actually matters
Why AI agents need code sandboxes: isolation models, timeouts, teardown hygiene, and what runaway agent code actually costs per vCPU-second.
How to avoid vendor lock-in with embedding APIs
Embedding vendor lock-in is real: vectors from different models never mix. Pinning strategies, re-embedding cost math, and model field discipline.
Transcription accuracy vs price: when cheap is fine and when it isn't
Transcription accuracy vs price in 2026: when a 10x cheaper Whisper API is fine, and when compliance, captions, or diarization justify paying more.
The xAI Grok image API: a practical guide for 2026
A practical guide to xAI's Grok image API in 2026: per-image pricing, the fixed output size, and where it fits next to FLUX hosts and GPT Image.
The 7 tools every AI agent needs (with real 2026 prices)
The seven tool APIs every AI agent needs in 2026: search, scrape, parse, embed, code, speech, and transcription, with real per-unit API prices.
MCP vs function calling: when a protocol beats a schema
MCP vs function calling explained: what each solves, when a protocol beats plain tool schemas, and when function definitions are all you need.
What an AI image actually costs in 2026: five API hosts compared
What an AI-generated image costs in 2026: five API hosts from $0.0108 to $0.084 per image, and how same-model arbitrage changes the picture.
LlamaParse vs Reducto: which document parser fits your stack in 2026
LlamaParse vs Reducto in 2026: base and premium pricing, quality scores, and the blended-cost math that decides which parser fits your documents.
Web search API latency: what actually matters for AI agents
Search API latency differs by tier for structural reasons. Why p95 matters more than p50 for agents, and when fastest-first routing is the right call.
BYOK economics: when bringing your own keys beats bundled pricing
Bring-your-own-keys routing costs a 5% fee instead of a 20% margin. The math on when BYOK wins, when bundled wins, and what negotiated rates change.
ElevenLabs vs LMNT vs Deepgram Aura-2: the 3.3x TTS price spread
Text-to-speech APIs span $0.036 to $0.12 per 1k characters routed. Voice quality is subjective, price is not. How to pick between the three tiers.
Spend caps for AI agents: budget safety before the loop runs away
Agents can burn API budget at machine speed. How spend caps, low-balance alerts, and worst-case price gates keep a runaway loop from becoming a bill.
Semantic vs keyword search: routing agent queries to the right tier
Agent search queries split into navigational and conceptual types. Route keyword lookups to cheap SERP APIs and semantic queries to neural search.
The 3 best embedding APIs in 2026: price, dimensions, and tradeoffs
DeepInfra's bge-large, OpenAI text-embedding-3-small, and Mixedbread mxbai-embed-large compared on price per million tokens, dimensions, and retrieval.
Quality scores: how we rank API providers (and what the scores are not)
Our 0-100 provider quality scores are hand-curated, published in an open catalog, and deliberately not benchmarks. Here is the honest methodology.
The 6 best web search APIs for AI agents in 2026
I route search traffic across Serper, Brave, You.com, Exa, Perplexity, and Firecrawl every day. Here is how they actually compare on price, speed, and result quality.
Scraping failures: blocks, empty bodies, and failover patterns that work
Web scraping APIs fail in ways that look like success. Why empty content should count as failure, and how to chain scraping providers for reliability.
How tool routing cuts agent costs (and where it honestly doesn't)
Tool routing saves money through price arbitrage within quality bands, not magic. A breakdown of where agent API savings are real and where they are not.
Deepgram Nova-3 vs Groq Whisper: what the 6x price gap buys you
Groq's hosted Whisper costs six times less per audio minute than Deepgram Nova-3. Here is what the managed feature set buys, and when it matters.
Prepaid credits vs subscriptions for AI APIs: why prepaid fits agents
Prepaid credits fit AI agents better than subscriptions because spend follows usage. The runaway-agent problem, spend caps, and billing honesty.
The best video generation APIs in 2026: an honest short list
Kling via fal.ai and Wan-2.2 via Replicate are the two hosted text-to-video routes I pay for. Per-second pricing, async job reality, honest limits.
The AI agent infrastructure stack in 2026: who does what
Models, gateways, tools, sandboxes, memory: the layers of the 2026 AI agent stack, who does what at each one, and where tool routing actually sits.
Embedding API pricing breakdown: the per-token math that matters
Embedding APIs cost $0.012 to $0.072 per million tokens routed. The per-token math for real corpus sizes, and why your embedding choice is lock-in.
Firecrawl for agent builders: scraping, search, and failover fit
Firecrawl does JS-rendered scraping at $1.92 per 1k pages routed and search with page content at $2.40. Where it fits in an agent's failover chain.
Normalized APIs vs provider lock-in: what one schema really costs
Normalized tool APIs trade provider quirks for portability. What the lowest-common-denominator trap costs you and how include_raw gets it back.
FLUX image API hosts compared: same model, three different prices
DeepInfra, fal.ai, and Replicate all host FLUX-dev at prices from $0.0108 to $0.036 per image routed. Same weights, 3.3x spread, real arbitrage.
The cheapest transcription API in 2026 (and when cheap is enough)
Groq's hosted Whisper costs $0.00084 per audio minute routed, roughly 6 to 10x cheaper than Deepgram or ElevenLabs. When cheap transcription wins.
Exa neural search: a practical guide for agent builders
Exa is the quality ceiling of the search API category at $8.40 per 1k queries routed. What neural search is actually good at, and when to skip it.
Circuit breakers for AI agents: stop retrying dead providers
Circuit breakers stop AI agents from hammering failing tool APIs. How error-rate windows work and why to trip only when a healthy alternative exists.
The best text-to-speech APIs in 2026: Deepgram vs LMNT vs ElevenLabs
Deepgram Aura-2, LMNT, and ElevenLabs span a 3.3x price range per 1k characters. How the TTS tiers differ and when premium voice quality pays off.
MCP servers explained for developers: local, remote, and why fewer is better
What MCP servers actually are, how remote servers differ from local ones, and why one server exposing 9 tools beats nine servers exposing one each.
E2B vs Daytona: choosing a code sandbox API when the price is a tie
E2B and Daytona cost an identical $0.0000168 per vCPU-second routed. When price cannot decide, here is how to pick a code sandbox for your agent.
Understanding per-unit pricing for AI APIs: a billing literacy guide
Per-query, per-page, per-character, per-second, per-token: what each AI API billing unit means, with real 2026 prices and the math to compare them.
The best document parsing APIs for RAG pipelines in 2026
LlamaParse, Reducto, and Mistral OCR compared for RAG: price per 1k pages, quality scores, and when the premium parsing tier actually pays off.
Serper vs Brave Search API: reseller economics vs an independent index
Serper resells Google results at $1.20 per 1k queries routed. Brave runs its own index at $6.00. When the 5x price gap is worth paying, and why.
Why AI agents need failover more than any software before them
Agents chain many tool calls, so single-vendor risk compounds fast. A look at 429s, blocks, outages, and the failover patterns that actually help.
Web scraping APIs compared: Jina vs Spider vs Firecrawl in 2026
I route scraping traffic across Jina Reader, Spider, and Firecrawl daily. Here is how they compare on JS rendering, markdown output, and price.
OpenRouter for tools: where the analogy works and where it breaks
OpenRouter proved one key and automatic fallbacks work for LLMs. Applying that model to tool APIs mostly works, but tools are not commodities.
What is a tool router? The missing layer in the AI agent stack
A tool router gives AI agents one key for search, scraping, parsing, and more, with automatic failover and price-aware routing across providers.