Source: https://internal-agents.com/agents/brex-disputes # Brex — Dispute preparation agent Brex’s Payment Operations team built an agent to prepare reasoned card-dispute submissions. - Company: [Brex](https://internal-agents.com/organizations/brex) - Collection: Agents - Approach type: Agent - Deployment stage: Deployed - Autonomy: Unknown - Evidence strength: Limited primary - Status: Internal - First reported year: 2025 - Work: Finance ops - Invocation: Unknown - Entry reviewed: 2026-09-17 ## Purpose ### Summary Brex’s Payment Operations team built an agent to prepare reasoned card-dispute submissions. Fact · Reported · Medium confidence · `brex-disputes--summary` Confidence reason: A linked participant or independent source reports the claim. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides Representative workflow: card dispute → reasoned submission. ## How it works ### Apply dispute rules The agent uses the dispute guide and the outsourced team’s operating procedure. Fact · Reported · Medium confidence · `brex-disputes--primitives-0` Confidence reason: A linked participant or independent source reports the claim. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ### Prepare the submission It finds applicable arguments and articulates the dispute rationale. Fact · Reported · Medium confidence · `brex-disputes--primitives-1` Confidence reason: A linked participant or independent source reports the claim. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ## Where people stay involved - **card dispute → reasoned submission** — Unknown · Level unknown **Unreported:** The source does not establish the required human review boundary. ### Supervision evidence #### Operating model assessment Unclassified for card dispute → reasoned submission; human attention boundary: unknown. Inference · Catalog judgment · Unverified confidence · `brex-disputes--operating-models-0` Confidence reason: The source describes Dispute preparation agent and its work, but does not establish whether a person must approve or inspect each successful output. Qualifications: - Observation date: 2025-09-25 Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ## Implementation details ### Harness Brex’s internal Retool-based agent builder. Fact · Reported · Medium confidence · `brex-disputes--architecture-harness` Confidence reason: A linked participant or independent source reports the claim. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ### Knowledge More than 100 pages of dispute guidance and the BPO standard operating procedure. Fact · Reported · Medium confidence · `brex-disputes--architecture-knowledge` Confidence reason: A linked participant or independent source reports the claim. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ### Implementation coverage - **Model:** unreported — Not documented for this subject in the reviewed source. - **Harness:** reported - **Sandbox:** unreported — Not documented for this subject in the reviewed source. - **Tool access:** unreported — Not documented for this subject in the reviewed source. - **Knowledge:** reported - **Context management:** unreported — Not documented for this subject in the reviewed source. - **Credentials:** unreported — Not documented for this subject in the reviewed source. - **Interfaces:** unreported — Not documented for this subject in the reviewed source. **Unreported:** The reviewed source does not report a distinct validation process for this subject. ## Reported observations Observation: Adoption output · Reported measurement · Dispute preparation agent: Brex reports preparation time fell from three hours to three seconds; measurement method is not provided. ### Key observation Brex reports preparation time fell from three hours to three seconds; measurement method is not provided. Metric · Reported · Medium confidence · `brex-disputes--key-metrics-0` Confidence reason: Self-reported by the source; no independent verification. Qualifications: - The source does not report the denominator of this figure. - Reported by: Brex - Scope: Dispute preparation agent: Brex reports preparation time fell from three hours to three seconds; measurement method is not provided. Evidence: - Supports · [1] [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) · Understanding complex rules and guides ## Lessons **Unreported:** The reviewed source does not document this for the named subject. ## Question coverage and scope - **purpose:** Reported - **workflow:** Reported - **human involvement:** Unreported — The source does not establish the required human review boundary. - **implementation:** Reported - **validation:** Unreported — The reviewed source does not report a distinct validation process for this subject. - **observations:** Reported - **lessons:** Unreported — The reviewed source does not document this for the named subject. ## Related reading - Built on: [Brex — Internal Agent Platform](https://internal-agents.com/agents/brex-agent-platform) ## Sources 1. [Agent, Human, Ops: How Brex Is Changing Roles and Workflows](https://www.firstround.com/ai/brex) - Case study · Independent secondary · Evidence - Original URL: - Published: 2025-09-25 · Accessed: 2026-08-12 · Last verified: 2026-08-31