{"uid":"cap_sVLthSERL6aFt3HdbdgWL","slug":"concurrency-guard-cdd4d8bd","name":"Concurrency Guard","description":"Enforce concurrent slot limits","url":"https://phion.systems/v1/paid/trust/concurrency-guard","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema"},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_c8UasLjB47HSHBtK0so08","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Enforces concurrent execution slot limits to prevent agents or workflows from exceeding defined parallelism thresholds","exampleAgentPrompt":"Before starting this new scraping task, check if we have a free concurrency slot — we're set to a max of 5 simultaneous jobs and I need to make sure we're not over the limit.","exampleUseCases":[{"title":"Agent fleet parallelism cap","prompt":"I have 10 agents that could all fire at once — can you enforce that no more than 3 run concurrently? Check before each one starts whether a slot is free."},{"title":"Rate-limit-safe API batch processing","prompt":"We're about to kick off a batch of 20 API calls but the downstream service only allows 4 concurrent connections — use the concurrency guard to make sure we never exceed 4 at a time."},{"title":"Multi-tenant workflow isolation","prompt":"Each of our tenants should only be allowed 2 simultaneous workflow executions — enforce that limit and block any new job from starting if both slots are already occupied."}],"resultDescription":"Returns a decision indicating whether a new concurrent execution slot is available or the limit has been reached, along with the current active slot count and whether the requesting agent/task is permitted to proceed.","failureModes":["Slot count already at maximum — request denied, agent must wait or retry","Missing or invalid resource/session identifier in request body","Concurrent write conflict when multiple agents check simultaneously (race condition)","Service unavailable or timeout if the guard store is unreachable","Stale slot state if a previous execution did not properly release its slot"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, policy-enforcing gate to cap parallelism across agent tasks, API calls, or workflow jobs — especially in agentic systems where many tasks can fire simultaneously and downstream services have strict concurrency limits. Prefer it over client-side counters when you need a centralized, authoritative source of truth for slot availability shared across distributed agents.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:46:07.397Z","isFirstParty":false}