--- title: Fan out 1,000 parallel agents from one request | daily.dev description: A recursive reasoner pattern lets a single HTTP request fan out to a thousand or more parallel agent calls by having an agent recursively call itself through a... canonical: https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Fan out 1,000 parallel agents from one request | daily.dev og:description: A recursive reasoner pattern lets a single HTTP request fan out to a thousand or more parallel agent calls by having an agent recursively call itself through a... og:url: https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc og:image: https://api.daily.dev/og/posts/MJUsxMukc.png og:image:alt: Fan out 1,000 parallel agents from one request og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Fan out 1,000 parallel agents from one request **[AgentField.ai](https://daily.dev/sources/agentfield)** · 7 min read · 0 upvotes · 0 comments ## Summary A recursive reasoner pattern lets a single HTTP request fan out to a thousand or more parallel agent calls by having an agent recursively call itself through a control plane. The control plane handles queueing, retries, and DAG-based tracing automatically, so the only application code needed is around 40 lines implementing the split-and-recurse logic in Python (with equivalent patterns shown in Go and TypeScript). A depth cap prevents runaway costs, and routing overhead of 100-200ms is paid once per level since each level executes concurrently. The example scales to a deep-research use case running 10,000+ agent invocations per query. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I limit the number of concurrent outbound calls an AgentField agent process makes? AgentField's SDK holds an internal semaphore on outbound calls controlled by the AGENTFIELD_AGENT_MAX_CONCURRENT_CALLS environment variable, which defaults to the connection pool size capped at 256. Calls beyond that ceiling are absorbed by the control plane's durable queue and drained as workers free up, so a single process never opens thousands of sockets at once. _daily.dev surfaces practical patterns like this for engineers tuning concurrency in agent fan-out systems._ ### How much latency overhead does routing agent calls through a control plane add compared to direct function calls? Routing each call through a control plane instead of a direct function pointer adds roughly 100 to 200 milliseconds per hop. For a fan-out where hundreds of calls happen concurrently within one level, that overhead is paid once per level rather than once per call, since the whole level executes in parallel. _Engineers weighing orchestration overhead against reliability gains can track these tradeoffs on daily.dev._ ### How many agent invocations does a depth-3 recursive fan-out with a branching factor of 10 actually produce? A depth-3 tree with a branching factor of 10 produces roughly 1,100 agent invocations total: 10 at the first level, 100 at the second, 1,000 leaf calls at the third, plus additional splits and synthesis calls along the way. Using a cheap model per call keeps the full run cost in the low single-digit dollars. _daily.dev helps developers estimate real-world costs before scaling recursive agent architectures._ ## Similar posts on daily.dev - [Building scalable, agent-friendly APIs for AI applications](https://daily.dev/posts/building-scalable-agent-friendly-apis-for-ai-applications-djgfy0fyg) · The New Stack · 0 upvotes · 0 comments - [Three Generations of Autoscaling — And Why Agentic Traffic Breaks All of Them](https://daily.dev/posts/three-generations-of-autoscaling-and-why-agentic-traffic-breaks-all-of-them-e5fyauhll) · Towards Data Science · 1 upvotes · 0 comments - [4 engineering patterns behind the strongest AI Agents Challenge submissions](https://daily.dev/posts/4-engineering-patterns-behind-the-strongest-ai-agents-challenge-submissions-v5ze5ppnk) · Google Developers · 0 upvotes · 0 comments - [Rethinking Debugging: The Recursive Agent Pattern](https://daily.dev/posts/rethinking-debugging-the-recursive-agent-pattern-o2nkt7ri7) · SitePoint · 1 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#ai-agents](https://daily.dev/tags/ai-agents), [#recursion](https://daily.dev/tags/recursion) [View this post on daily.dev](https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Fan out 1,000 parallel agents from one request","url":"https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc"},"datePublished":"2026-10-02T17:45:20.674Z","dateModified":"2026-10-02T18:08:20.539Z","description":"A recursive reasoner pattern lets a single HTTP request fan out to a thousand or more parallel agent calls by having an agent recursively call itself through a...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6930b869483c96963c37d10227fb3bbe?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6930b869483c96963c37d10227fb3bbe?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"AgentField.ai","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"AgentField.ai","logo":"https://media.daily.dev/image/upload/s--VLFHaedl--/f_auto/v1791063152/squads/33beeb91-1f14-4d9b-9cf8-db7d9f69160a?_a=BAMAMicg0","url":"https://daily.dev/squads/agentfield"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,ai-agents,recursion","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"AgentField.ai","item":"https://daily.dev/squads/agentfield"},{"@type":"ListItem","position":3,"name":"Fan out 1,000 parallel agents from one request"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/fan-out-1-000-parallel-agents-from-one-request-mjusxmukc#faq","mainEntity":[{"@type":"Question","name":"How do I limit the number of concurrent outbound calls an AgentField agent process makes?","acceptedAnswer":{"@type":"Answer","text":"AgentField's SDK holds an internal semaphore on outbound calls controlled by the AGENTFIELD_AGENT_MAX_CONCURRENT_CALLS environment variable, which defaults to the connection pool size capped at 256. 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