$49 Diagnostic
$49
One reproducible JavaScript/TypeScript API, SDK, MCP, or x402 integration issue with an evidence-backed diagnosis and repair plan. It does not include a patch.
Reproduce one integration failure. Agree the repair. Get a runnable patch and tests.
For one feasible API, SDK, MCP, or x402 issue in a JavaScript or TypeScript codebase. The existing $299 Fix includes a scoped patch, focused tests, and run instructions. If the cause or scope is unclear, the existing $49 Diagnostic provides an evidence-backed diagnosis and repair plan without a patch.
Discuss an integration fix
Tell us what currently fails and share a redacted public reproducer or error. This page prepares text in your browser only and does not transmit or store an inquiry. Opening your email app does not send a request; nothing reaches us until you send the message. Direct contact: contact@m2msentinel.com.
One short inquiry starts both service paths
Review the prepared email before sending
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Already discussing a Base preflight? Add exact-call scope details
Secondary: exact Base integration scope
For the existing Base transaction or signing-boundary service. This detailed form is useful after the issue is narrowed to an exact call; it prepares text locally for your clipboard and does not upload these values. We confirm feasibility, scope, acceptance, and payment route before work starts.
After scope review: optional purchase handoff
Copy the prepared scope text into an email to contact@m2msentinel.com. Opening the email is not proof that we received or accepted the request. If we confirm a feasible scope and you accept it, use the relevant existing API checkout below. The links create API access only and do not include the separately scoped Fix service.
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Existing offers, kept separate
Scope decides which path is appropriate. These labels describe existing offers; they do not create a new tier or promise an outcome.
$299 Fix
$299
One agreed, feasible JavaScript/TypeScript integration issue or one Base preflight boundary with a patch, focused regression tests, and run instructions. This is a bounded service offer, not an API subscription.
$299 Growth API subscription
$299
Existing 31-day API access and decision credits when purchased as a subscription. It is separate from the $299 Fix; the Growth Integration Sprint handoff below is a separately scope-accepted offer using this plan, not an automatic subscription entitlement.
Choose the separate $299 Fix for one bounded issue when recurring M2M API access is not needed; choose the $299 Growth Integration Sprint for one accepted Base preflight handoff paired with recurring Growth API access and decision credits.
See the boundary running
Two no-wallet technical proofs show the handoff shape before a buyer adapts it to a real codebase: an Openfort-compatible EIP-7702/ERC-4337 signing callback and a Locus-compatible standalone dynamic payment callback.
Transaction-specific preflight evidence
POST /v1/transaction/preflight accepts one strictly validated Base transaction and returns selector-specific executing-target observations for an API-key or verified RapidAPI request. The surface is metered through existing decision credits, is not x402-payable, and has no separate x402 price.
- One fixed observation block number and hash is threaded through code, storage, Beacon, EIP-7702, Diamond loupe, facet, and simulation reads.
- Resolution identifies the surface target, implementation or selected Diamond facet, full path, bytecode hashes, capability evidence, and explicit incomplete states.
- The caller applies policy before its own signing/send callback; M2M Sentinel does not return a safety, maliciousness, reachability, or exploitability conclusion.
Request: { chainId: 8453, to: "0x…", data: "0x…", from?: "0x…", value?: "0x…", blockNumber?: 50635225 }
Response fields: selectorHex · resolvedExecutionTarget · resolution · bytecodeHashes · observationBlock · simulationObservation · evidenceGrade
Reproducible P1 benchmark (run 2026-08-30): Base block 50635225, hash 0x11de5f4de1d6a92aed6d64c4f23ecc82af0e89ef203f230ce29716a0de6d86a8, package versions M2M Sentinel 2.2.0, evm-proxy-detection 3.0.0, @evmnow/sdk 0.7.0. The five M2M transaction observations measured 992.19–3,784.11 ms (mean 1,765.18 ms) against the recorded quorum; four were verified and the Diamond case remained an explicit incomplete observation. These are benchmark observations, not an uptime or latency promise.
Deployment status: this route is live on the canonical API. Evaluate the frozen sample shape and the runnable standalone public example source (run node examples/transaction_preflight.js from that checkout for the deterministic mock-only flow); do not send credentials or signing secrets to the example.
One evidence contract, two customer-owned boundaries
- Sponsored wallet calls: preflight every fully specified Base
wallet_sendCallscall, apply the caller's policy in request order, then forward the unchanged provider request only if every call passes. The public no-wallet guard example performs no signing, sponsorship, or broadcast. - Custody or treasury approval: place the existing single-transaction preflight before the customer's own API approver or authorization policy. The customer keeps keys, custody, policy, approval, signing, and broadcast.
Both paths send the exact Base call fields to the configured API over TLS. The adapter itself does not log or persist them, but an integrator must assess calldata sensitivity and the configured service's retention policy. No relationship with a wallet, paymaster, or custody provider is implied.
Growth Integration Sprint — scope-accepted handoff using existing Growth API subscription
$299
Existing Growth API subscription price; not the separate $299 Fix.
After a scope is accepted, this separate sprint offer pairs the existing API access with one codebase and one Base transaction decision boundary for the runnable preflight handoff listed here. The handoff is part of this accepted sprint scope, not a default entitlement of the API subscription alone.
- One customer repository or codebase
- One Base sponsorship, approval, or signing boundary
- One runnable proxy/EIP-7702-aware preflight patch
- A bounded seven-day implementation handoff
- Existing Growth API access
Start with the scope form above. Payment is optional and only follows an accepted scope.
Pro Production Sprint — existing Pro API subscription
$999
Existing Pro API subscription price.
After a scope is accepted, use a larger bounded scope when two transaction flows need runnable patches and deployment-ready handoff documentation.
- Up to two transaction flows
- Runnable integration patches
- Deployment and handoff documentation
- Existing Pro API access
Start with the scope form above. Payment is optional and only follows an accepted scope.
Optional API purchase after scope acceptance
The payment links are revealed after the scope handoff above. If scope is accepted, payment creates the normal API subscription; the server-side plan catalogue and the signed checkout quote remain the authority for price, duration, credits, and access. This surface adds no API tier, entitlement, x402 route, or price.
| Offer | Base-USDC / native checkout | RapidAPI card path |
|---|---|---|
| Growth API subscription | Available after accepted scope (Growth) | RapidAPI ULTRA maps to the existing Growth service plan. |
| Pro API subscription | Available after accepted scope (Pro) | RapidAPI MEGA maps to the existing Pro service plan. |
RapidAPI bills its own marketplace subscription and does not create a native sk_live_… key. A receipt or intent reference is used only to reconcile the requested handoff.
What the handoff contains
- Scope confirmation against the accepted service or existing Growth/Pro API plan.
- Runnable patch(es) at the agreed signing boundary, with proxy and EIP-7702 resolution covered where applicable.
- Reproduction and test commands, plus explicit unresolved cases and caller-owned policy decisions.
- For Growth, a bounded seven-day implementation handoff. For Pro, deployment and handoff documentation that your team can review and run.
Neither sprint promises a safety verdict, exploit detection, guaranteed deployment, uptime, preferential support, or an ongoing SLA. The API's evidence and unknown-state semantics remain unchanged.
The fulfillment procedure for another coding agent is maintained in docs/PAID_INTEGRATION_SPRINT_RUNBOOK.md.