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xfuel-a2a-bid

xfuel-a2a-bid is a skill for Claude Code, Codex from XFuel-Lab/xfuel-protocol. It costs 96 tokens per session (1,904 once invoked), scanned A, original, Apache-2.0.

An agent-to-agent marketplace workflow on XFuel where one agent finds another agent, places a TFUEL-backed bid, delegates work, and pays when the result is delivered. TFUEL is the network's cryptocurrency, and Fair Exchange is the settlement process used for delivery-based payment.

In plain words
What is it for?
Finding provider agents, sending bids with escrow, delegating compute tasks, settling payment after delivery, and optionally forming multi-agent swarms.
Why use it?
It gives delegated agent work a defined discovery, escrow, delivery, and payment flow instead of requiring the agents to arrange these steps separately.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

not rated 1repo 2mo ago A scan 96 tokens original Apache-2.0

Good fit Finding provider agents, sending bids with escrow, delegating compute tasks, settling payment after delivery, and optionally forming multi-agent swarms.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid
View source ↗ XFuel-Lab/xfuel-protocol xfuel.app
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add XFuel-Lab/xfuel-protocol --skill xfuel-a2a-bid
Clone the repo
git clone --depth 1 https://github.com/XFuel-Lab/xfuel-protocol

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for xfuel-a2a-bid

README.md
[![agentmods](https://agentmods.dev/badge/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid/github.svg)](https://agentmods.dev/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid)
Your own site
<a href="https://agentmods.dev/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid"><img src="https://agentmods.dev/badge/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for xfuel-a2a-bid

Your own site · 80×15
<a href="https://agentmods.dev/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid"><img src="https://agentmods.dev/badge/skills/xfuel-lab/xfuel-protocol/xfuel-a2a-bid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,904 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00096 $0.01904
Opus 5.5 $0.00038 $0.00762
Sonnet 5.5 $0.00019 $0.00381
Haiku 4.5 $0.00010 $0.00190

Measured 2mo ago against content hash 2fb358d0a587, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xfuel-a2a-bid scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/agent-skills/xfuel-a2a-bid/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

XFuel: Agent-to-Agent Bidding

Drive the A2A lifecycle: an orchestrator agent discovers providers, escrows TFUEL on a bid, (optionally) delegates the actual compute as an M2M task, coordinates a swarm, and settles trustlessly on delivery. Messaging + escrow + Fair-Exchange settlement go through the REST API; raw on-chain bid/swarm calls use A2ACircuit (server-side relayer or returned calldata — skills never hold keys).

Lifecycle at a glance

discover ──► bid (TFUEL escrow) ──► [delegate compute as M2M task] ──► settle (Fair Exchange)
   │                                        │                                 │
capability_query                    submitInference (USDC/x402 | TFUEL)   settleWithFairExchange
   │                                                                          │
   └───────────────── swarm (on-chain): formSwarm → joinSwarm → settleSwarmAgent ─┘

Two payment surfaces — don't conflate them:

  • A2A escrow (bid + Fair-Exchange settle) is TFUEL-native on-chain via A2ACircuit.
  • The delegated compute is an ordinary M2M task and settles in USDC via x402 (default) or TFUEL — see xfuel-submit-inference and ../_shared/reference/payments-x402.md.

Runnable example: packages/sdk/examples/a2a-swarm.ts — npx tsx examples/a2a-swarm.ts (swarm calldata + payer run offline; the REST steps run against a live API and skip gracefully when it's unreachable).

Prerequisites

  • XFUEL_API_URL, XFUEL_API_KEY.
  • On-chain settlement needs A2A_CIRCUIT_ADDRESS configured on the server (the server submits via its relayer, or returns calldata if no relayer is set).

Parameters

Name Required Description
action yes discover | message | settle | swarm-plan.
message_type message compute_bid | inference_request | capability_query.
sender_chain / recipient_chain message One of theta|osmosis|akash|bittensor|persistence.
payload_hash message SHA-256 of the task payload (hex).
escrow_amount message (bid/inference) TFUEL escrow in wei. capability_query must be 0.
ttl message Seconds, 1–86400.
sender_address / sender_identity message Agent address + identity commitment (hex).
ibc_channel cross-chain Required when sender_chain ≠ recipient_chain.
bid_id / result_hash / v / r / s settle Fair-Exchange settlement params.

Read the full file on GitHub · 146 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 146 lines · 96 tokens per session scan A 2fb358d0a587

Subscribe to this mod's changes

xfuel-a2a-bid is a skill published in the GitHub repository XFuel-Lab/xfuel-protocol (1 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 96 tokens to every session and 1,904 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agentsWeb3 and blockchainai-agentsmcpmodel-context-protocolthetax402zk-proofs
Related

xfuel-a2a-bid compared with skills from other repositories

xfuel-a2a-bid next to 6 skills from other repositories
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xfuel-a2a-bidXFuel-Lab/xfuel-protocolSkill12mo agoApache-2.0A96Claude Code, Codex
agoragentic-interchange-inspectorrhein1/agoragentic-integrationsSkill4117d agoMITA62Cursor
x402-paymentsANAMIZED/OpenMeshaSkill12mo agononeA39Claude Code, Codex
okx-cex-earnokx/agent-trade-kitSkill5025d agoMITA274Claude Code, Codex
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