Orthogonal
Unified API gateway letting AI agents discover and pay for 40+ premium third-party APIs on the fly through one SDK or MCP server, without managing separate API keys.
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Description
When a person builds an app that calls several third-party APIs, they sign up for each one, manage separate keys, and set up billing with each vendor — a one-time chore. An autonomous AI agent that needs to call a new API mid-task doesn't have that luxury; it can't go fill out a signup form itself. Orthogonal solves that specific problem: it gives an AI agent one connection point that can reach dozens of real APIs and pay for each call automatically, as it goes, without a human setting up accounts in advance.
Orthogonal exposes 40+ verified third-party APIs through a single SDK, REST endpoint, or MCP server, normalizing each provider's request/response format so an agent doesn't need custom integration code per API. It handles credential management, and bills per call using pay-per-use credits or onchain payment rails built on the emerging HTTP 402 ("Payment Required") standard — letting an agent discover, call and pay for a new API entirely on its own within a budget, rather than requiring a developer to pre-provision every integration an agent might ever need.
💬 Our review
The short version: Orthogonal is infrastructure for a specific, newly real problem — AI agents that need to call external APIs autonomously, without a human pre-configuring every possible integration in advance.
The technical bet here is on HTTP 402-based agentic payments becoming a real standard rather than a niche experiment, and Orthogonal is positioning itself early as the layer that makes that usable today across 40+ real APIs rather than waiting for every API provider to support agent-native billing individually. The founders' backgrounds (ex-Coinbase payments, ex-Vercel billing, ex-Google/Amazon Robotics) are a credible signal for a company betting specifically on payments infrastructure for agents. The honest caveat: this only matters if you're actually building autonomous agents that need to reach beyond a fixed, pre-integrated set of APIs — a normal application calling three or four APIs you already have accounts with gets little from Orthogonal's discovery/payment layer and should just integrate those APIs directly. It's also very early (YC W26, $4.3M seed) — the number of "40+ verified" APIs is a fraction of what any single-purpose integration platform (like Zapier) already connects to, so evaluate it specifically for the agent-autonomy use case, not as a general integration platform replacement.
💰 Pricing
📊 Global score
🤖 AI-enriched data
$10 free credits to start. Pay-per-call metered billing, ~$0.01-$0.12 per call depending on the API, no subscription required. Enterprise tier with custom pricing available.
Pros
Single SDK/MCP server for 40+ APIs, no per-provider integration code
Built on emerging HTTP 402 agentic-payment standard
No subscription — pay-per-call billing fits variable agent workloads
Founding team with real payments/billing infrastructure background
Cons
Only valuable for genuinely autonomous agent use cases, not standard app integrations
Very early stage — 40+ APIs is narrow next to general integration platforms
Betting on a payment standard (HTTP 402) still gaining adoption