Agents That Show Their Work. Paid per Call.

Research, security, legal and finance agents you call over plain HTTP and pay per request in USDC on Base. No account, no subscription. Every answer comes back signed, with a record of each source it read, so you can check it instead of taking it on faith.

How a Call Works

  1. 1. Ask

    POST JSON to an agent endpoint. Without payment the hub answers 402 with an x402 v2 challenge: price, USDC asset, and the address to pay on Base.

  2. 2. Authorize

    Sign an EIP-3009 transfer authorization for exactly that amount and send it back in the PAYMENT-SIGNATURE header. The facilitator pays the gas.

  3. 3. Verify

    The work runs first and the payment settles only if it succeeds. The answer arrives as a signed envelope you can check without trusting us.

29 Agents

Prices are per call in USDC. A request that fails validation is never charged, and a failed run is never settled.

  • Autonomous Lead Enrichment

    $0.50

    Scrapes a company homepage, deduces its value proposition and buyer persona, and drafts a targeted B2B cold email.

    POST /api/v1/enrich-lead
  • Smart Contract Auditor

    $1.00

    Solidity vulnerability analysis (reentrancy, overflow, access control, logic bugs) with a severity-ranked JSON report.

    POST /api/v1/audit-contract
  • Prediction Market Analyzer

    $0.10

    Sentiment analysis and a calibrated 0-100 probability that a Polymarket/Kalshi-style event resolves Yes.

    POST /api/v1/predict-market
  • Cross-Platform Arbitrage & Resolution Rules Lawyer

    $0.75

    Finds fine-print divergences between two prediction markets (e.g. Polymarket vs Kalshi), prices basis risk, and returns ARBITRAGE_SAFE / BASIS_RISK_TRAP / NO_EDGE with Kelly hedge sizing. Prices are USD per share (0-1).

    POST /api/v1/arbitrage-lawyer
  • Self-Healing Scraper & DOM-to-JSON Compiler

    $0.40

    Synthesizes durable CSS selectors (Cheerio; no XPath) for a target JSON schema, proves them against the live DOM in-request, and returns the extracted data plus a ready-to-run TypeScript Cheerio extractor.

    POST /api/v1/heal-scraper
  • On-Chain Bytecode & Unverified Token Trap Detector

    $0.25

    Reads live Base bytecode, proxy slots (EIP-1967/beacon/zeppelinos/EIP-1822/EIP-1167), ERC-20 state, and privileged selectors to score honeypot and rug risk: SAFE | CAUTION | HONEYPOT_RUG.

    POST /api/v1/detect-token-trap
  • SaaS Pricing & Competitor Battlecard Spy

    $1.50

    Scrapes up to 3 competitor sites (plus their pricing pages) and returns a live deal battlecard: pricing tiers, hidden fees and limits, landmine questions, objection handling, and wedge features.

    POST /api/v1/competitor-battlecard
  • PR / Dependency Breaking-Change & Exploit Gatekeeper

    $0.50

    Two-stage adversarial review of a unified diff (bug hunter, then patch synthesizer) plus deterministic secret and dependency scanning; returns mergeApproved, riskScore 0-100, findings, and drop-in patches.

    POST /api/v1/gatekeep-diff
  • Medical Bill Upcoding & Overcharge Slasher

    $3.00

    Audits itemized medical bills for E/M upcoding, NCCI unbundling, duplicate and unit errors; estimates Medicare and fair-price benchmarks; and drafts a dispute letter citing applicable No Surprises Act and NCCI rules.

    POST /api/v1/audit-medical-bill
  • E-Commerce Chargeback Representment Builder

    $2.50

    Scores representment win probability, maps merchant evidence to the network rubric for the reason code (including a deterministic Visa CE3.0 eligibility check), lists missing evidence, and writes a rebuttal ready for Stripe or Shopify disputes. Uses only supplied evidence; never fabricates.

    POST /api/v1/fight-chargeback
  • Dark Pattern Contract & Subscription Exit Lawyer

    $1.00

    Finds auto-renewal, notice-window, and early-termination traps in a contract or live Terms page, maps them to ROSCA, state automatic-renewal laws, EU/UK consumer law, and contract breach triggers, and drafts a formal termination and payment-revocation notice.

    POST /api/v1/terminate-contract
  • Global Customs & Tariff Engineering Optimizer

    $1.50

    Classifies a product under the HS/HTS with GRI reasoning, estimates MFN and additional duties, lists defensible lower-duty alternatives and lawful physical tariff-engineering changes, and drafts an accurate commercial invoice description.

    POST /api/v1/optimize-tariff
  • Patent Design-Around & Freedom-to-Operate Architect

    $2.00

    Breaks independent claims into atomic limitations, maps the product to each (literal and doctrine of equivalents), scores claims under the all-elements rule, and proposes 3 engineering design-arounds that remove at least one required limitation.

    POST /api/v1/bypass-patent
  • ADA / WCAG Lawsuit Shield & DOM Auto-Patcher

    $0.75

    Audits a page's DOM for the WCAG failures most cited in ADA demand letters (alt text, form labels, empty buttons/links, lang, headings, landmarks, skip links, zoom), returns a litigation risk score, per-element patched HTML, and a drop-in interim <script> hotfix.

    POST /api/v1/patch-accessibility
  • Prediction-Market Clarification Impact Pricer

    $0.50

    Given a Polymarket market (slug, URL or conditionId; Kalshi ticker supported), reads the rules clarification (Additional context) from the UMA adapter on Polygon, finds the real-world outcomes whose resolution changed, shifts fair probability by their verified, ensemble-estimated mass, walks the live CLOB book at your size after fees and slippage, and returns BUY_YES / BUY_NO / EXIT / HOLD / NO_MATERIAL_CHANGE with fractional-Kelly sizing.

    POST /api/v1/clarification-impact
  • Grant Milestone Verifier with Signed Release Attestation

    $2.00

    Decides whether a grantee met a milestone before a DAO releases the next tranche or stream. Checks GitHub as of the due date (commits, tags, releases, CI, files), npm/PyPI/crates.io publish times, Snapshot proposal state, on-chain deployments (bytecode selector scan through proxies, Sourcify, creation transaction), and URLs; judges the rest with an ensemble plus a skeptical reviewer, reads Sablier Lockup streams on-chain, and returns a per-criterion PASS/FAIL/UNVERIFIABLE verdict, releaseBps, and an EIP-712 signed attestation.

    POST /api/v1/verify-milestone
  • UMA Dispute EV Desk

    $0.50

    For a Polymarket market in its UMA challenge window, reads the live proposal on Polygon (adapter, optimistic oracle, bond, finalFee, expiry), judges P(proposal wrong or too early) against the literal rules with an ensemble plus red-team pass and verified quotes, and computes DISPUTE vs ABSTAIN expected value (bond win/loss, DVM lock cost, gas, your position and reset delay). Returns DISPUTE / DO_NOT_DISPUTE / MONITOR_UNTIL with a UTC deadline and the full EV breakdown.

    POST /api/v1/dispute-ev
  • DeFi Cover Claim Adjudicator

    $5.00

    Predicts whether a DeFi cover claim (Nexus Mutual or any provider's wording) will be approved and for how much. Reads the wording, postmortems and the claimant's transactions, quantifies net token loss with Chainlink prices at the loss block, maps facts to covered events, exclusions and conditions with verbatim verified clauses, cites similar past claims, and returns calibrated P(approved), expected payout, an assessor vote (APPROVE/DENY/ABSTAIN), a claimant action (FILE/FILE_WITH_MORE_EVIDENCE/DO_NOT_FILE) and the missing evidence that would change the verdict.

    POST /api/v1/cover-claim
  • Vault Exit Lawyer

    $0.25

    Before moving treasury funds out of an ERC-4626 or ERC-7540 vault: reads the chain at one pinned block and returns how much can exit now, the haircut vs convertToAssets, partial-exit maximum, liquidity coverage, queue/cooldown timing, admin-power flags (upgrade, pause, multisig threshold, timelock), and a verdict EXIT_NOW_FULL / EXIT_PARTIAL / QUEUED / BLOCKED / UNKNOWN. With a holder it simulates redeem via eth_call. Optional docsUrls are checked against the contract for contradictions. All numbers are computed deterministically; the model only reads documentation.

    POST /api/v1/vault-exit
  • Cross-Lingual Dark Science Arbitrage Scout

    $1.50

    Mines non-English scientific literature (OpenAlex, Crossref, HAL, J-STAGE, Europe PMC) for work with no English-language twin: native-terminology keyword plan per language, English-twin screening, English methodology translation, pattern-extracted quote-verified quantitative results, index-sourced institutions, a computed known-in-English risk (OpenAlex English citers and title similarity), and a deterministic 0-100 commercial whitespace score from a model judgment ensemble. Degrades gracefully when one index fails and reports sourcesQueried and sourceFailures.

    POST /api/v1/mine-foreign-research
  • arXiv-to-Production Code & Hyperparameter Compiler

    $1.00

    Fetches an arXiv paper's full text (ar5iv), selects method, pseudocode, hyperparameter tables and ablations, and returns a core-algorithm summary, hyperparameters each with a source pointer and a verbatim quote verified against the text, ablation warnings with evidence sentences, and one self-contained TypeScript or Python file that is compile/syntax-checked and literal-checked against the extracted values. Falls back to the abstract (lower confidence) when no full-text rendering exists. Generated code is never executed.

    POST /api/v1/arxiv-to-code
  • Global Prior-Art Patent Invalidator

    $2.50

    Segments patent claims into elements in code (dependent claims inherit their parents' elements; claims, priority date and cited art can be read from a patent number), searches arXiv, OpenAlex, Europe PMC, Crossref, HAL and J-STAGE with a strict published-before-priority-date cutoff, maps references to elements with verbatim verified quotes (translated when not English), and computes 102 anticipation, minimal 103 combinations and a rule-based invalidation probability. Evidence is abstract/metadata level; not legal advice.

    POST /api/v1/find-prior-art
  • Scientific Consensus & Replication Failure Auditor

    $0.75

    Resolves a paper (DOI/title) or free-text claim, mines citing works and citation-context sentences from Semantic Scholar, OpenAlex and Europe PMC, checks Crossref/Europe PMC/OpenAlex retraction and erratum status (a retraction short-circuits to UNREPLICABLE_HYPE without model calls), reports scite.ai citation tallies as a separate signal, and returns a deterministic replicationRiskScore with ROBUST / CONTESTED / UNREPLICABLE_HYPE / INSUFFICIENT_EVIDENCE. Every contradicting study carries a verified verbatim quote.

    POST /api/v1/audit-replication
  • Abandoned Compound & Uncommercialized Trial Miner

    $2.00

    Mines ClinicalTrials.gov for terminated, withdrawn and suspended studies and for completed Phase 1/2 non-industry studies with no later industry Phase 2/3/4 trial, joins Europe PMC and OpenAlex literature, classifies why each was shelved (keyword rules; one fast model call only for an ambiguous reason or a missing mechanism, verified by verbatim quote), checks ChEMBL and the FDA Orange Book for approved, withdrawn or boxed-warning molecules, and strictly excludes any candidate with a safety, toxicity or drug-versus-placebo adverse-event excess. Returns a Repurposing Dossier per survivor: trials with NCT links, mechanism, shelving reason, safety/dosage data, IP window estimate, US regulatory pathway with non-compliant routes flagged, evidence grade, computed concerns and a deterministic de-risk score. One candidate failing does not discard the others. Not medical or regulatory advice.

    POST /api/v1/mine-abandoned-compounds
  • Adversarial Unicode & Trojan Source gatekeeper

    $0.25

    Scans files or a unified diff for adversarial Unicode with the 19 rules (USC001-USC019) of dcondrey/unicode-safety-check: bidi controls (Trojan Source), invisible and default-ignorable characters, variation-selector and tag-character payloads (Glassworm), private-use code points, homoglyph and mixed-script identifiers, confusable collisions, misplaced BOM and control characters. Returns findings with 1-based code point columns, a SARIF 2.1.0 log, a block/warn/pass verdict derived from severities, and model-written exploit explanations pinned to the findings.

    POST /api/v1/unicode-safety-gate
  • Forensic AI-trajectory & prose craft auditor

    $1.00

    Deterministic prose forensics: word echoes within 50 words, repeated 3-6-grams, sentence-starter runs, hedge/filter/passive/nominalization density, burstiness, MATTR, Flesch-Kincaid, vocabulary fingerprints, AI syntactic tics (Not X. Y. pivots, verbless fragments, autonomous body parts), optional revision-history trajectory, and an editorial humanization map whose quotes are verified verbatim. Every finding has exact offsets and line:column. The humanTrajectoryScore is a documented heuristic, not proof of authorship.

    POST /api/v1/audit-prose-forensics
  • Crosstalk epistemic swarm & falsification engine

    $2.00

    Runs the Crosstalk reasoning protocol on a question: classifies the domain, generates up to 3 independent hypotheses, attacks each with an adversarial falsification pass, checks live literature on arXiv and OpenAlex (every record content-addressed by sha256), then synthesizes a calibrated answer with unresolved cruxes and one decisive falsification probe. Every material statement is a typed ledger entry (FACT, ASSUMPTION, INFERENCE, CONJECTURE, PROPOSAL) with evidence digests; FACT claims lacking a verified retrieved record are downgraded, invented citations are stripped, and the stage transcript is a recomputable sha256 hash chain.

    POST /api/v1/crosstalk-deliberate
  • OnRecord statutory clock & redaction auditor

    $1.50

    Audits an agency's public-records response: computes the statutory response deadline and days late (California CPRA, with the court-day calendar and § 7922.535 extension rules), flags redactions without an exemption citation, passages redacted in one document but readable in another, referenced attachments that were not supplied, and gaps in the document timeline. Every claim carries UTF-8 byte offsets and SHA-256 hashes of the exact span and the whole document; the narrative and appeal points may cite only those ids.

    POST /api/v1/audit-public-record
  • WARM verifiable agent memory

    $0.10

    Durable per-wallet agent memory with temporal facts: remember (structured facts or free text), recall (BM25 plus exact triple pattern, as of any time), forget (cryptographic forgetting that leaves a tombstone) and explain (provenance and supersession). Every fact has a ToIP SAID; every write returns a hash-chained, optionally signed receipt. Tenant is the paying wallet.

    POST /api/v1/warm-memory

Every Answer Carries Its Receipt

Responses arrive as { data, _provenance }. The envelope holds a C2PA-style manifest listing each source the agent fetched, with its SHA-256, and a W3C Verifiable Credential signed by did:web:agents.writerslogic.com using eddsa-jcs-2022. A second signature from the hub’s attestation key covers the same digest.

Change one byte of the answer and verification fails. Check any envelope for free at POST https://agents.writerslogic.com/api/v1/verify-provenance, or verify it yourself against the public key in the DID document.

Use Them From Your Assistant

The open-source MCP server exposes every agent as a tool, signs payments from your own wallet, and refuses any call above the per-call limit you set.

$ npx -y github:writerslogic/ai-agents-mcp